CN107027145A - Channel measuring method and device - Google Patents
Channel measuring method and device Download PDFInfo
- Publication number
- CN107027145A CN107027145A CN201610071088.5A CN201610071088A CN107027145A CN 107027145 A CN107027145 A CN 107027145A CN 201610071088 A CN201610071088 A CN 201610071088A CN 107027145 A CN107027145 A CN 107027145A
- Authority
- CN
- China
- Prior art keywords
- sta
- ndp
- sends
- parameter
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 66
- 230000005540 biological transmission Effects 0.000 claims abstract description 297
- 238000005259 measurement Methods 0.000 claims abstract description 133
- 238000012549 training Methods 0.000 claims description 164
- 230000011664 signaling Effects 0.000 claims description 90
- 210000004209 hair Anatomy 0.000 claims description 14
- 241000208340 Araliaceae Species 0.000 claims 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 2
- 235000008434 ginseng Nutrition 0.000 claims 2
- 208000032370 Secondary transmission Diseases 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 40
- 238000012545 processing Methods 0.000 description 23
- 238000005516 engineering process Methods 0.000 description 19
- 101150081243 STA1 gene Proteins 0.000 description 17
- 238000004891 communication Methods 0.000 description 15
- 238000003860 storage Methods 0.000 description 15
- OVGWMUWIRHGGJP-WVDJAODQSA-N (z)-7-[(1s,3r,4r,5s)-3-[(e,3r)-3-hydroxyoct-1-enyl]-6-thiabicyclo[3.1.1]heptan-4-yl]hept-5-enoic acid Chemical compound OC(=O)CCC\C=C/C[C@@H]1[C@@H](/C=C/[C@H](O)CCCCC)C[C@@H]2S[C@H]1C2 OVGWMUWIRHGGJP-WVDJAODQSA-N 0.000 description 10
- 101000988961 Escherichia coli Heat-stable enterotoxin A2 Proteins 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 230000006870 function Effects 0.000 description 7
- OVGWMUWIRHGGJP-WTODYLRWSA-N (z)-7-[(1r,3s,4s,5r)-3-[(e,3r)-3-hydroxyoct-1-enyl]-6-thiabicyclo[3.1.1]heptan-4-yl]hept-5-enoic acid Chemical compound OC(=O)CCC\C=C/C[C@H]1[C@H](/C=C/[C@H](O)CCCCC)C[C@H]2S[C@@H]1C2 OVGWMUWIRHGGJP-WTODYLRWSA-N 0.000 description 5
- 101100366889 Caenorhabditis elegans sta-2 gene Proteins 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 238000004904 shortening Methods 0.000 description 5
- 101100161473 Arabidopsis thaliana ABCB25 gene Proteins 0.000 description 4
- 101100096893 Mus musculus Sult2a1 gene Proteins 0.000 description 4
- YLKFDHTUAUWZPQ-UHFFFAOYSA-N N-Nitrosodi-n-propylamine Chemical compound CCCN(N=O)CCC YLKFDHTUAUWZPQ-UHFFFAOYSA-N 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000004040 coloring Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000004549 pulsed laser deposition Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- LFULEKSKNZEWOE-UHFFFAOYSA-N propanil Chemical compound CCC(=O)NC1=CC=C(Cl)C(Cl)=C1 LFULEKSKNZEWOE-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the present invention provides a kind of channel measuring method and device, and this method includes：Access point AP sends channel measurement trigger frame TF S at least two site STAs；Wherein, the TF S send the empty data frame NDP measured for up channel for triggering at least two STA；The TF S include：Each STA sends the parameter configured information for the transmission parameter that the NDP is used, and the parameter configured information determines transmission parameter and transmission time for the STA；Further, the AP receives STA described at least two and sends the NDP that parameter is sent according to the STA is corresponding in each described STA corresponding transmission times respectively, and carries out channel measurement；Wherein, without interframe space between the NDP in STA described at least two transmitted by any two adjacent S TA；So as to shorten the time needed for channel measurement, channel measurement efficiency is improved.
Description
Technical field
The present embodiments relate to the communication technology, more particularly to a kind of channel measuring method and device.
Background technology
Channel measurement is a highly important technology in wireless communications, by channel measurement, and transmitting terminal can be obtained
The channel conditions of each receiving node, so as to carry out user's scheduling, Precoding Design, multi-user's multiple-input and multiple-output (Multi-
User Multiple-Input Multiple-Outpu, abbreviation MU-MIMO) transmission etc., so as to improve the capacity of wireless network.
In the measurement of multi-user's up channel, access point (Access Point, abbreviation AP) needs to measure and multiple websites
Channel between (Station, abbreviation STA), i.e. each STA be required to AP send empty data frame (Null Data Packet,
Abbreviation NDP).Fig. 1 for prior art uplink multi-users channel measurement schematic flow sheet, as shown in figure 1,1) AP to each
STA (such as STAs) sends up empty data frame notice (Null Data Packet Announcement, abbreviation NDPA), described
NDPA is used to notify each STA to send the NDP measured for up channel；2) after NDPA is received, first STA (such as STA
1) NDP is sent first to AP, wherein, first STA is that position is in the in each STA signalings domain included by the NDPA
The corresponding STA in one STA signalings domain；3) AP is after the NDP is received, channel measurement of the completion pair between STA1；4) AP according to
It is secondary to send up poll frame to remaining STA, so that each STA sends respective to AP successively after corresponding up poll frame is received
NDP, until whole up channel measurement process terminates.
It can be seen that, AP needs to send up poll frame to notify each STA to send to AP successively to each STA successively in the prior art
(assuming that there is N number of up STA, then whole up channel measurement process at least needs N to take turns the friendship between AP and STA to respective NDP
Mutually), therefore, the time needed for channel measurement is longer.
The content of the invention
The embodiment of the present invention provides a kind of channel measuring method and device, improves channel measurement efficiency.
In a first aspect, the embodiment of the present invention provides a kind of channel measuring method, including：
Access point AP sends channel measurement trigger frame TF-S at least two site STAs；Wherein, the TF-S is used to trigger this
At least two STA send the empty data frame NDP measured for up channel；The TF-S includes：Each STA sends the NDP
The parameter configured information of the transmission parameter used, the parameter configured information determines transmission parameter and transmission for the STA
Time；The AP receives at least two STA to join in each STA corresponding transmission times according to corresponding send of the STA respectively
The NDP that number is sent, and carry out channel measurement；Wherein, between the NDP at least two STA transmitted by any two adjacent S TA
Without interframe space.
In the present invention, access point AP by least two site STAs send channel measurement trigger frame TF-S so that each
The STA sends the parameter configured information for the transmission parameter that the NDP is used according to the STA carried in TF-S, determines each
Transmission parameter and send the time, and sent respectively in the respective transmission time according to corresponding transmission parameter from the trend AP
NDP；Further, the AP receives NDP (wherein, the nothings between the NDP transmitted by each adjacent S TA that at least two STA are sent
Interframe space), and carry out channel measurement；It can be seen that, in the embodiment of the present invention, the AP sends TF-S at least two STA at the same time
Afterwards, at least two STA can automatically determine the transmission time for each sending NDP, and in the corresponding transmission time from the trend AP
Send between NDP, and NDP transmitted by each adjacent S TA without interframe space, so that the time needed for shortening channel measurement,
Improve channel measurement efficiency.
In one specific example, each STA send the transmission parameter that the NDP is used parameter configured information include under
State one of information or any combination：
Access identity card AID, the spatial flow configured information of the STA and the STA of the STA send the channel used in the NDP
Resource unit RU configured informations；
Wherein, the AID of the STA is used to indicate that the STA needs to send NDP to the AP；The spatial flow configured information bag of the STA
Include the configured information that the STA sends the training sequence part in the NDP to the AP.It can be seen that, each STA hairs are carried in the TF-S
The parameter configured information for the transmission parameter that the NDP used is given, during so that each STA automatically determining out transmission parameter and transmission
Between.
More specifically, also include in the TF-S：The corresponding carrier sense of each STA is indicated；The carrier sense indicates to be used to indicate
Whether the STA carries out carrier sense；Wherein, if the carrier sense indicates that the STA need not carry out carrier sense, the STA
Directly NDP is sent to the AP；If the carrier sense indicates that the STA carries out carrier sense, the STA is sent to the AP
Carrier sense is carried out before NDP.It can be seen that, each STA can indicate to determine whether to carry out carrier sense according to carrier sense, rather than every time
Carrier sense is all carried out before NDP is sent, the time needed for channel measurement is further shorten, so as to improve channel measurement effect
Rate.
Accordingly, second aspect, the embodiment of the present invention provides a kind of channel measuring method, including：
First site STA receives the channel measurement trigger frame TF-S that access point AP is sent；Wherein, the TF-S is used to trigger extremely
Few two STA send the empty data frame NDP measured for up channel；The TF-S includes：Each STA sends the NDP institutes
The parameter configured information of the transmission parameter of use；Wherein, the first STA belongs at least two STA；
First STA is determined to send parameter and is sent the time according to the parameter configured information；
First STA sends NDP according to the transmission parameter in the transmission time to the AP；Wherein, the NDP and the STA phases
Without interframe space between NDP transmitted by adjacent any STA.
In the present invention, the channel measurement for carrying parameter configured information that the first site STA receives access point AP transmissions is touched
Send out frame TF-S；Further, the first STA automatically determines transmission parameter and transmission time according to the parameter configured information, and
The transmission time, from trend AP transmissions NDP, (wherein, any STA adjacent with the STA NDP was sent out according to the transmission parameter
Without interframe space between the NDP sent) so that the AP carries out channel measurement according to the NDP；It can be seen that, in the embodiment of the present invention, this
One STA can automatically determine the transmission time for sending NDP, and from trend, the AP sends NDP, and the NDP in the corresponding transmission time
Without interframe space between NDP transmitted by any STA adjacent with the STA, so that the time needed for shortening channel measurement, carries
High channel measurement efficiency.
The third aspect, the embodiment of the present invention provides a kind of means for channel measurement, and access point AP includes the means for channel measurement,
The device includes：
Sending module, for sending channel measurement trigger frame TF-S at least two site STAs；Wherein, the TF-S is used for
Trigger at least two STA and send the empty data frame NDP measured for up channel；The TF-S includes：Each STA is sent
The parameter configured information for the transmission parameter that the NDP is used, the parameter configured information for the STA determine transmission parameter and
The transmission time；
Receiving module, for receiving at least two STA respectively in each STA corresponding transmission times according to the STA
It is corresponding to send the NDP that parameter is sent, and carry out channel measurement；Wherein, any two adjacent S TA institutes at least two STA
Without interframe space between the NDP of transmission.
Fourth aspect, the embodiment of the present invention provides a kind of means for channel measurement, and the first site STA is filled including the channel measurement
Put, the device includes：
Receiving module, the channel measurement trigger frame TF-S for receiving access point AP transmissions；Wherein, the TF-S is used to trigger
At least two STA send the empty data frame NDP measured for up channel；The TF-S includes：Each STA sends the NDP
The parameter configured information of the transmission parameter used；Wherein, the first STA belongs at least two STA；
First determining module, for determining to send parameter according to the parameter configured information and sending the time；
Sending module, for sending NDP to the AP according to the transmission parameter in the transmission time；Wherein, the NDP is with being somebody's turn to do
Without interframe space between NDP transmitted by any STA adjacent STA.
In the present invention, the AP is sent after TF-S at least two STA at the same time, and at least two STA can be automatically determined respectively
From the transmission time for sending NDP, and in the corresponding transmission time NDP, and the NDP transmitted by each adjacent S TA are sent to the AP
Between without interframe space so that the time needed for shortening channel measurement, improves channel measurement efficiency.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the uplink multi-users channel measurement of prior art；
Fig. 2A is the schematic flow sheet of channel measuring method embodiment one of the present invention；
Fig. 2 B are application scenarios schematic diagram of the invention；
Fig. 2 C are TF-S frame structure schematic diagram；
Fig. 2 D are the form schematic diagram one in STA M signalings domain；
Fig. 2 E are the form schematic diagram two in STA M signalings domain；
Fig. 2 F are the form schematic diagram three in STA M signalings domain；
Fig. 2 G are the form schematic diagram four in STA M signalings domain；
Fig. 2 H are NDP frame structure schematic diagram one；
Fig. 2 I are NDP frame structure schematic diagram two；
Fig. 2 J are NDP frame structure schematic diagram three；
Fig. 2 K are NDP frame structure schematic diagram four；
Fig. 3 A are uplink multi-users channel measurement schematic diagram one；
Fig. 3 B are uplink multi-users channel measurement schematic diagram two；
Fig. 4 A are uplink multi-users channel measurement schematic diagram three；
Fig. 4 B are uplink multi-users channel measurement schematic diagram four；
Fig. 5 A are uplink multi-users channel measurement schematic diagram five；
Fig. 5 B are uplink multi-users channel measurement schematic diagram six；
Fig. 6 A indicate schematic diagram for STA packet；
Fig. 6 B are uplink multi-users channel measurement schematic diagram seven；
Fig. 7 is uplink multi-users channel measurement schematic diagram eight；
Fig. 8 is uplink multi-users channel measurement schematic diagram nine；
Fig. 9 is the schematic flow sheet of carrier sense indicating means embodiment of the present invention；
Figure 10 is the schematic flow sheet of trigger frame indicating means embodiment of the present invention；
Figure 11 is the structural representation of means for channel measurement embodiment one of the present invention；
Figure 12 is the structural representation of means for channel measurement embodiment two of the present invention；
Figure 13 is the structural representation of means for channel measurement embodiment three of the present invention；
Figure 14 is the structural representation of means for channel measurement example IV of the present invention；
Figure 15 is the structural representation of means for channel measurement embodiment five of the present invention；
Figure 16 is the structural representation of means for channel measurement embodiment six of the present invention；
Figure 17 is the structural representation of AP embodiments of the present invention；
Figure 18 is the structural representation of STA embodiments of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Access point (AP, Access Point), also referred to as wireless access points or bridger or focus etc., it can
With access server or communication network.
Website (STA, Station), can also be referred to as user, can be wireless senser, wireless communication terminal or movement
Terminal, such as supports the mobile phone (or being " honeycomb " phone) of WiFi communication function and the calculating with radio communication function
Machine.For example, it may be WiFi communication function portable, pocket, hand-held, built-in computer are supported, it is wearable, or
The vehicle-mounted radio communication device of person, they exchange the communication datas such as voice, data with wireless access network.
In 802.11 standards, channel measurement technology mainly has two major classes：1) the first is explicit channel measurement：Transmitting terminal
Training sequence is sent to receiving terminal, receiving terminal measures transmitting terminal to the channel between receiving terminal by the training sequence, and will survey
The feedback of channel information of amount is to transmitting terminal；2) second is implicit information channel measurement：Receiving terminal sends training sequence to transmitting terminal, hair
Sending end measures receiving terminal to the channel between transmitting terminal by the training sequence, then obtains transmitting terminal extremely by channel reciprocity
Channel between receiving terminal.Because implicit information channel measurement needs transmitting terminal and receiving terminal to be corrected, process is more complicated, because
This, in 802.11ac standards, channel measuring method is based on explicit channel measurement.
Fig. 2A is the schematic flow sheet of channel measuring method embodiment one of the present invention.As shown in Figure 2 A, the side of the present embodiment
Method can include：
S201, access point AP send channel measurement trigger frame TF-S at least two site STAs.
Fig. 2 B are application scenarios schematic diagram of the invention, as shown in Figure 2 B, in the measurement of multi-user's up channel, access point
AP sends channel measurement trigger frame TF-S at least two site STAs (such as N number of STA, N are positive integer) simultaneously, wherein, it is described
TF-S sends the empty data frame NDP measured for up channel for triggering at least two STA；The TF-S includes：
Each STA sends the parameter configured information for the transmission parameter that the NDP is used, and the parameter configured information is used for described
STA determines transmission parameter and transmission time, alternatively, and each STA sends the parameter for the transmission parameter that the NDP is used
Configured information includes one of following information or any combination：Access identity card (the Association of the STA
Identifier, abbreviation AID), the spatial flow configured information of the STA and the STA send channel resource used in the NDP
Unit R U configured informations；Wherein, the AID of the STA is used to indicate that the STA needs to send NDP to the AP；The STA's
Spatial flow configured information includes the configured information that the STA sends the training sequence part in the NDP to the AP；It is optional
Ground, the spatial flow configured information includes the spatial stream number N of the STAss(now spatial flow position is designated as acquiescence to configured information
Start position), or the spatial flow configured information includes the spatial stream number N of the STAssConfigured information and spatial flow position refer to
Show information.Alternatively, the frame structure of the TF-S can use the triggering frame structure in 802.11ax, and (Fig. 2 C are as shown in Figure 2 C
TF-S frame structure schematic diagram), the frame structure of the TF-S includes：(such as STA 1 believes for common signaling domain and N number of STA signalings domain
Make domain, signaling domain ... the STA N signalings domains of STA 2).Alternatively, the common signaling domain of the TF-S includes type indication information；
Wherein, the type that the type indication information is used to indicate trigger frame is TF-S.Alternatively, the AP is at least in main pre-set bandwidths
TF-S is sent at least two STA simultaneously on channel, for whether sending TF-S on other channels and how to send TF-
S is not limited, and for example transmission bandwidth is 80MHz, and the AP can send TF-S on whole 80MHz channels；Can also be
TF-S is sent on main 20MHz channels, then the TF-S is copied on other 3 20MHz channels and sent respectively.
Alternatively, each STA sends at least one in the parameter configured information for the transmission parameter that the NDP is used
Planting information can be carried in the common signaling domain of the TF-S, or be carried in each STA of TF-S signaling domain.Example
Such as, carried in the TF-S STA M (1≤M≤N) send the transmission parameter that the NDP is used parameter configured information can
Implementation include it is following several, wherein, letter is indicated with the STA M parameters for sending the transmissions parameter that the NDP is used
Breath includes：The AID of the STA M, the spatial flow configured information of the STA M and the STA M are sent used in the NDP
RUMIt is described in detail exemplified by configured information：1) the first carrying mode：Fig. 2 D are the form schematic diagram one in STA M signalings domain,
As shown in Figure 2 D, the parameter configured information for the transmission parameter that the STA M transmissions NDP is used can all be carried on institute
State in the STA M signalings domain in TF-S；2) second of carrying mode：Fig. 2 E are the form schematic diagram two in STA M signalings domain, are such as schemed
Shown in 2E, the AID of the STA M, the spatial flow of the STA M are carried in the STA M signalings domain in the TF-S and indicates letter
Breath and other information, the STA M send the RU used in the NDPMConfigured information is carried on the common signaling domain of the TF-S
In；3) the third carrying mode：Fig. 2 F are the form schematic diagram three in STA M signalings domain, as shown in Figure 2 F, in the TF-S
The RU used in AID, the STA M transmission NDP of the STA M is carried in STA M signalings domainMConfigured information and other
Information, the spatial flow configured information of the STA M is carried in the common signaling domain of the TF-S；4) the 4th kind of carrying mode：
Fig. 2 G are the form schematic diagram four in STA M signalings domain, as shown in Figure 2 G, institute are carried in the STA M signalings domain in the TF-S
STA M AID and other information is stated, the spatial flow configured information of the STA M and the STA M are sent used in the NDP
RUMConfigured information is all carried in the common signaling domain of the TF-S.
Alternatively, the AP is at least two STA before channel measurement trigger frame TF-S is sent, in addition to：Really
RU (such as RU used in fixed each STA1,RU2,...,RUN) and each STA spatial flow；Wherein, each RU can be
Include the RU of certain amount (such as 26,52,106,242,484,996) subcarrier.
S202, site STA M receive the channel measurement trigger frame TF-S that access point AP is sent.
In this step, STA M (i.e. the first STA) receive the TF-S that the AP is sent, and the TF-S is used to trigger extremely
Few two STA (wherein, the STA M belong at least two STA) send the sky measured for up channel to the AP
Data frame NDP；Wherein, the parameter that STA M (1≤M≤N) send the transmission parameter that the NDP is used is carried in the TF-S
The implementation of configured information is referred to shown in above-mentioned Fig. 2 D to Fig. 2 G, and here is omitted.Alternatively, the STA is at least in master
The TF-S that the AP is sent is received on pre-set bandwidths channel (such as main 20MHz channels).
S203, the STA M are determined to send parameter and are sent the time according to the parameter configured information.
In this step, the STA M send the hair that the NDP is used according to the STA M carried in the TF-S
The parameter configured information of parameter is sent to determine to send parameter, such as described STA M AID, the spatial stream number N of the STA MssM, it is empty
Between stream position and the STA M send RU used in the NDPM；Further, the STA M are according to STA P (1≤P<M) send out
The parameter configured information for the transmission parameter that NDP used is sent to automatically determine transmission time (alternatively, the STA M for sending NDP
The spatial stream number N of the STA P is determined according to the corresponding parameter configured informations of the STA PssPEtc. information, and according to the NssP
Determine to send the NDP transmission time etc. information；Wherein, the STA P are the signaling in TF-S signaling domain positioned at the STA M
STA before domain), to ensure any STA (such as STA M-1 and STA M+1) institute that the NDP that the STA M are sent is adjacent thereto
Without interframe space between the NDP of transmission；Alternatively, the NDP includes：Common preamble part and training sequence part, or, institute
Stating NDP only includes：Training sequence part；Wherein, the signaling domain of STA P described in the signaling domain of the TF-S is located at the STA
Before M signaling domain.
S204, the STA M send NDP according to the transmission parameter in the transmission time to the AP.
In the present embodiment, due to the transmission time be the STA M according to STA P (1≤P<M) corresponding parameter is indicated
The time that information is automatically determined, and ensure that the NDP that the STA M are sent any STA (such as STA M-1 and STA adjacent thereto
M+1 without interframe space between the NDP transmitted by), therefore, in the embodiment of the present invention, send and take turns to the STA M without the AP
Frame is ask, the STA M are automatic to send NDP frames according to the transmission parameter in the transmission time to the AP.
Alternatively, the frame structure of the NDP can be based on the NDP frame structures in 802.11ax, 1) when the NDP frames bag
Include：When common preamble part and training sequence part, as illustrated in figure 2h (Fig. 2 H be NDP frame structure schematic diagram one), it is public before
Leading part includes：Legacy practices domain L-STF, traditional long training domain L-LTF, traditional signaling message domain L-SIG, repetition traditional signaling message domain
RL-SIG and signaling domain A (such as HE-SIG-A)；Training sequence part includes：First Short Training domain (such as HE-STF) and NssMIt is individual
Long training domain (such as HE-LTF 1 ... HE-LTF NssM), wherein, the first Short Training domain is used for the AP and carries out automatic growth control
(Automatic Gain Control, abbreviation AGC) and/or initial frequency deviation estimation etc., the NssMIndividual long training domain is used for described
AP carries out channel measurement.Alternatively, the training sequence part also includes：Synchronized for the AP and the STA
Two Short Training domains (such as HE-STF 1, accordingly, the first Short Training domain can be HE-STF 2), as shown in figure 2i (Fig. 2 I
For NDP frame structure schematic diagram two).
2) when the NDP frames only include：During training sequence part, (Fig. 2 J are NDP frame structure schematic diagram as shown in fig. 2j
Three), training sequence part includes：First Short Training domain (such as HE-STF) and NssMIndividual long training domain (such as HE-LTF 1 ... HE-
LTF NssM).Alternatively, the training sequence part also includes：The second short training synchronized for the AP and the STA
Practice domain (such as HE-STF 1, accordingly, the first Short Training domain can be HE-STF2), (Fig. 2 K are NDP frame as shown in figure 2k
Structural representation four).
S205, the AP receive STA described at least two respectively in each described STA corresponding transmission times according to
STA is corresponding to send the NDP that parameter is sent, and carries out channel measurement.
Wherein, without interframe space between the NDP in STA described in described at least two transmitted by any two adjacent S TA.
In this step, the AP receive STA described at least two respectively each described STA corresponding transmission times according to
The STA is corresponding to send the NDP (without interframe space between the NDP i.e. transmitted by each adjacent S TA) that parameter is sent, and respectively
The each channel between the STA and the AP of training sequence part measurement in each described NDP, for example, the AP
Receive transmission time that the STA M are determined in the STA M sends parameter (STA as described according to the STA M are corresponding
M spatial stream number NssM, spatial flow position and the STA M send RU used in the NDPMDeng) transmitted by NDP, and according to
Training sequence part in the NDP measures the channel between the STA M and AP；Alternatively, according to training sequence portion
Progress channel measurement is divided to refer to existing mode, here is omitted.It can be seen that, in the embodiment of the present invention, the AP at the same time to
At least two STA are sent after TF-S, and without sending poll frame at least two STA successively, at least two STA can be certainly
The dynamic transmission time for determining each to send NDP, and send NDP, and described at least two to the AP in the corresponding transmission time
Without interframe space between NDP in STA transmitted by any two adjacent S TA, so that the time needed for shortening channel measurement, carries
High channel measurement efficiency.
Alternatively, when the training department point includes：During the first Short Training domain, the AP is respectively according to each level
Before joining each channel between the STA and the AP of training sequence part measurement in NDP, the AP is first according to described the
One Short Training domain carries out AGC and/or initial frequency deviation estimation etc.；When the training department point includes：The first Short Training domain and institute
When stating the second Short Training domain, each STA of training sequence part measurement of the AP respectively in each described cascade NDP
Before channel between the AP, the AP is synchronized according to the second Short Training domain with the STA, and according to described
First Short Training domain carries out AGC and/or initial frequency deviation estimation etc..
In the present embodiment, access point AP by least two site STAs send channel measurement trigger frame TF-S, wherein,
The TF-S includes：Each STA sends the parameter configured information for the transmission parameter that the NDP is used；Further,
Each described STA sends the parameter configured information for the transmission parameter that the NDP is used according to the STA carried in TF-S,
Determine respective transmission parameter and transmission time, and respectively in the respective transmission time according to corresponding transmission parameter to described
AP sends NDP；Further, the AP receives the NDP of STA transmissions described at least two (wherein, transmitted by each adjacent S TA
NDP between without interframe space), and carry out channel measurement；It can be seen that, compared in the prior art, STA is only receiving poll
It can just be sent after frame to AP in NDP mode, the embodiment of the present invention, the AP is sent after TF-S at least two STA at the same time,
Each STA can automatically determine the transmission time for each sending NDP, and send NDP from AP described in trend in the corresponding transmission time,
So as to shorten the time needed for channel measurement, channel measurement efficiency is improved.
Alternatively, the embodiment of the present invention can be applied in WLAN, for example with 802.11a, 802.11b,
802.11g, 802.11n and 802.11ac etc. for representative Wi-Fi systems in, also can apply with Wi-Fi systems of future generation or under
In generation wireless local area network (WLAN) system, the present invention is not restricted to this.
On the basis of above-described embodiment, alternatively, also include in the TF-S：The corresponding carrier wave of each STA (such as STA M)
Intercept instruction；The carrier sense indicates to be used to indicate whether the STA carries out carrier sense；Wherein, if the carrier sense
Indicate that the STA (such as STA M) need not carry out carrier sense, then the STA (such as STA M) directly sends to the AP
NDP；If the carrier sense indicates the STA (such as STA M) and carries out carrier sense, the STA (such as STA M) to
The AP can carry out carrier sense before sending NDP and (can certainly be determined whether without carrier sense by the STA
Carrier sense).1) alternatively, the TF-S includes a carrier sense instruction, and the carrier sense indicates to be used to indicate often
Whether the individual STA carries out carrier sense, alternatively, and the carrier sense indicates that the common signaling domain of the TF-S can be carried on
In；2) alternatively, the TF-S includes：Each corresponding carrier sense instruction of the STA (such as STA M), each STA
Corresponding carrier sense indicates to be used to indicate whether corresponding STA carries out carrier sense, alternatively, and each STA is corresponding
Carrier sense indicates to be carried in the common signaling domain of the TF-S, or be carried on each STA of the TF-S
In signaling domain.Alternatively, the carrier sense includes Physical carrier sense and virtual carrier sensing in wireless network communication；Wherein, 1) physical carrier is detectd
Listen and refer to that user (including AP and STA) needs to detect whether channels pending are idle before sending the information, if user detects
Signal on to channel is that WiFi signal and its power are less than first threshold (such as -82dBm) or detected on channel and has
Non- WiFi signal and its power are less than Second Threshold (such as -62dBm), then it is assumed that the channel idle to be sent；Conversely, then
Think the channel busy to be sent；2) virtual carrier sensing in wireless network communication is the enhancing to Physical carrier sense, and its core concept is user
One NAV (NAV is a timer) is set, when user receives the signal of other users, in order to protect other users
Information exchange, duration (duration) information that the user includes in the signal according to the other users received come
The NAV (NAV=duration is for example set) of itself, the NAV is set to reduce over time, the user reduces to 0 in NAV
It is busy to think present channel before, therefore, when the user carries out carrier sense, only when Physical carrier sense and virtually
When carrier sense all indicates channel for idle condition, just determine that present channel is idle.
Accordingly, STA M described in step 204 is sent in the transmission time according to the transmission parameter to the AP
Before NDP, in addition to：
The STA M indicate to determine whether to carry out carrier sense according to the carrier sense；
The STA M send NDP according to the transmission parameter in the transmission time to the AP, including：
When the STA determines to carry out carrier sense, or determine to need to carry out carrier sense and intercepted result is letter
When road is idle, the STA M send NDP according to the transmission parameter in the transmission time to the AP.
In the present embodiment, the STA M indicate to determine whether to carry out carrier sense according to the carrier sense；If 1) described
Carrier sense indicates that the STA M need not carry out carrier sense, i.e., described STA M determine that carrier sense need not be carried out, then
The STA M directly send NDP according to the transmission parameter in the transmission time to the AP；If 2) carrier sense refers to
Show that the instruction STA M carry out carrier sense, then the STA M can carry out carrier sense before NDP is sent to the AP
(can not certainly carrier sense, the STA M determine whether carrier sense)；2a) when the STA M determine carrier sense and
When it is determined that carrier sense result is channel idle, the STA M are in the transmission time according to the transmission parameter to described
AP sends NDP；2b) when the STA M determine carrier sense, and carrier sense result is when being channel busy, then the STA M are not
NDP is sent to the AP；2c) when the STA M are determined without carrier sense (without considering channel status), then STA M
NDP is directly sent to the AP according to the transmission parameter in the transmission time.It can be seen that, the STA M can be detectd according to carrier wave
Listen instruction determine whether carry out carrier sense, rather than every time send NDP before all carry out carrier sense, further shorten channel
Time needed for measurement, so as to improve channel measurement efficiency
It is described in step S203 on the basis of above-described embodiment in channel measuring method embodiment two of the present invention
STA M determine the spatial stream number N of the STA M according to the corresponding parameter configured informations of the STA MssM, spatial flow position and institute
State the RU used in STA M transmissions NDP (alternatively, the NDP only includes training sequence part)M；Further, the STA M
First transmission time T is determined according to the corresponding parameter configured informations of the 2nd STAM；Wherein, the 2nd STA includes：The TF-S
Signaling domain in be located at the first STA signaling domain before STA, such as STA P (1≤P<M)；Wherein, described first send
Time TMThe transmission time of the NDP is sent for the STA M (i.e. described STA M send the time of training sequence part)；Can
Selection of land, the STA M determine the spatial stream number N of the STA P according to the corresponding parameter configured informations of the STA PssPDeng letter
Breath, and according to the spatial stream number NssPDetermine that described first sends time T etc. informationM。
Assuming that the time point that STA M receive TF-S is T0(i.e. the time point that each STA receives TF-S is T0), note the
The duration in one Short Training domain is Δ Ts, the duration of each long training domain is Δ TL, then can be determined according to formula one
STA M send NDP the first transmission time TM；Wherein, formula one is：TM=T0+xIFS+(M-1)ΔTs+(Nss1+Nss2+...+
Nss M-1)ΔTL, wherein, xIFS is one section of prefixed time interval, for example, can take xIFS=SIFS=16 μ s.Alternatively, it is above-mentioned
What formula was calculated by taking the NDP frame structures shown in Fig. 2 J as an example, if being calculated by taking the NDP frame structures shown in Fig. 2 K as an example, (note second is short
The duration of training domain is Δ Ts), then it can determine that STA M send the first of NDP and send time T according to formula twoM；Wherein,
Formula two is：
TM=T0+xIFS+2(M-1)ΔTs+(Nss1+Nss2+...+Nss M-1)ΔTL。
Accordingly, in step S204, the STA M are in TMMoment passes through the RUMThe NDP is sent to the AP；Its
In, without interframe space between the NDP transmitted by STA (such as STA M-1 and STA M+1) adjacent with the STA M NDP.
Accordingly, in step S205, the AP receives each STA and sends the time (such as STA M corresponding first
In TMMoment) by corresponding transmission parameter, (such as STA M are in RUM) send successively only include the NDP of training sequence part, its
In, without interframe space between the NDP that any two adjacent S TA is sent, (Fig. 3 A believe for uplink multi-users as shown in Figure 3 A and Figure 3 B
Road instrumentation plan one, Fig. 3 B are uplink multi-users channel measurement schematic diagram two)；It can be seen that, compared in the prior art, STA is only
Having can just send in NDP mode, the embodiment of the present invention after poll frame is received to AP, and each STA is after TF-S is received
Automatically determine the respective transmission time, and send NDP corresponding transmission is automatic, substantially reduce needed for channel measurement when
Between, improve channel measurement efficiency.
It is described in step S203 on the basis of above-described embodiment in channel measuring method embodiment three of the present invention
STA M determine the spatial stream number N of the STA M according to the corresponding parameter configured informations of the STA MssM, spatial flow position and institute
Stating STA M transmissions NDP, (alternatively, the NDP includes：Common preamble part and training sequence part) used in RUM；Further
Ground, the STA M are according to STA P (1≤P<M) corresponding parameter configured information determines the first transmission time TM, wherein, described
One sends time TMIncluding：The STA M send the second transmission time T of the common preamble part of the NDPM1And it is described
STA M send the 3rd transmission time T of the training sequence part of the NDPM2；Alternatively, the STA M are according to the STA P
Corresponding parameter configured information determines the spatial stream number N of the STA PssPEtc. information, and according to the spatial stream number NssPDeng letter
Breath determines that described first sends time TM。
Assuming that the time point that STA M receive TF-S is T0(i.e. the time point that each STA receives TF-S is T0), note is every
The duration of individual common preamble part is Δ TA, the duration in each first Short Training domain is Δ Ts, each long training domain
Duration is Δ TL, then can be according to TM=T0+xIFS+(M-1)ΔTA+(M-1)ΔTs+(Nss1+Nss2+...+Nss M-1)ΔTL
(formula three) determines that STA M send the first of NDP and send time TM(TM1=TM, TM2=TM+ΔTA)；Wherein, xIFS is one section
Prefixed time interval, for example, can take xIFS=SIFS=16 μ s.Alternatively, above-mentioned formula is with the NDP frame structures shown in Fig. 2 H
Exemplified by calculate, if being calculated by taking the NDP frame structures shown in Fig. 2 I as an example, (duration in the second Short Training domain of note is Δ Ts), then
It can determine that STA M send the first of NDP and send time T according to formula fourM；Wherein, formula four is：
TM=T0+xIFS+(M-1)ΔTA+2(M-1)ΔTs+(Nss1+Nss2+...+Nss M-1)ΔTL。
Accordingly, in step S204, the STA M send time T secondM1At least through the RUMOccupied
Bandwidth (such as shown in Fig. 4 B, the channel of measurement needed for STA 2 for first 20MHz bandwidth half, then STA 2 need the
Common preamble part is sent on one 20MHz), the common preamble part of the NDP is sent to the AP；And when the 3rd sends
Between TM2Pass through the RUM(as shown in Figure 4 B, the channel of measurement needed for STA 2 is first 20MHz half, then STA 2 is the
Training sequence part is sent on one 20MHz half channel) training sequence part of the NDP is sent to the AP；Wherein,
Without interframe space between NDP transmitted by STA (such as STA M-1 and STA M+1) adjacent with the STA M NDP.
Accordingly, in step S205, the AP receives each STA and sends the time (such as STA M corresponding first
In TMMoment) by corresponding transmission parameter, (such as STA M are in RUM) send successively include common preamble part and training sequence
Partial NDP, wherein, without interframe space between the NDP that any two adjacent S TA is sent, (Fig. 4 A are as shown in Figure 4 A and 4 B shown in FIG.
Uplink multi-users channel measurement schematic diagram three, Fig. 4 B are uplink multi-users channel measurement schematic diagram four)；It can be seen that, shorten channel
Time needed for measurement, improve channel measurement efficiency.
It is described in step S203 on the basis of above-described embodiment in channel measuring method example IV of the present invention
STA M determine the spatial stream number N of the STA M according to the corresponding parameter configured informations of the STA MssM, spatial flow position and institute
Stating the STA M transmissions NDP, (alternatively, the NDP includes：Common preamble part and training sequence part) used in RUM；Enter
One step, the STA M are according to STA P (1≤P<M) corresponding parameter configured information determined for the 4th transmission time TcWith the 5th hair
Send time TM；Wherein, the described 4th time T is sentcDuring the transmission for the common preamble part that the NDP is sent for the STA M
Between, the described 5th sends time TMThe transmission time of the training sequence part of the NDP is sent for the STA M；Alternatively, institute
State the spatial stream number N that STA M determine the STA P according to the corresponding parameter configured informations of the STA PssPEtc. information, and according to
The spatial stream number NssPDetermined for the 4th transmission time T etc. informationcTime T is sent with the 5thM。
Assuming that the time point that STA M receive TF-S is T0(i.e. the time point that each STA receives TF-S is T0), note is every
Individual STA sends the 4th transmission time T of common preamble part simultaneouslyc=T0+ xIFS, wherein, xIFS is between one section of preset time
Every can for example take xIFS=SIFS=16 μ s；The duration of each common preamble part is Δ TA, each first Short Training
The duration in domain is Δ Ts, the duration of each long training domain is Δ TL, then can determine that STA M are sent according to formula five
The 5th of training sequence part sends time TM, wherein, formula five is TM=Tc+ΔTA+(M-1)ΔTs+(Nss1+Nss2+...+
Nss M-1)ΔTL.Alternatively, above-mentioned formula is calculated by taking the NDP frame structures shown in Fig. 2 H as an example, if with the NDP frames shown in Fig. 2 I
Calculated exemplified by structure and (remember the duration in the second Short Training domain for Δ Ts), then it can determine that STA M send instruction according to formula six
Practice Sequence the 5th sends time TM；Wherein, formula six is：
TM=Tc+ΔTA+2(M-1)ΔTs+(Nss1+Nss2+...+Nss M-1)ΔTL。
Accordingly, in step S204, the STA M send time T the 4thcAt least through the RUMOccupied band
Width, the common preamble part of the NDP is sent to the AP；And send time T the 5thMPass through the RUMSent to the AP
The training sequence part of the NDP；Wherein, STA adjacent with the STA M NDP (such as STA M-1 and STA M+1) institute
Without interframe space between the training sequence part of transmission, (i.e. first STA, can with STA 1 for the common preamble part of the NDP
Selection of land, first STA is the STA of first transmission training sequence part at least two STA, or is described
Be located at the STA in first signaling domain in TF-S signaling domain) between the training sequence part that sends without interframe space.
Accordingly, in step S205, the AP receives each described STA and sends time T the 4thcAccording to corresponding hair
Parameter is sent while the NDP sent common preamble part, and receives each described STA in the corresponding 5th transmission time (such as STA
M is in TMMoment) by corresponding transmission parameter, (such as STA M are in RUM) the NDP training sequence part that sends successively；Wherein, institute
Without interframe space between the training sequence part that the common preamble part and STA 1 (i.e. first STA) for stating NDP are sent, arbitrarily
Without interframe space between the training sequence part that two adjacent S TA are sent, (Fig. 5 A are uplink multi-users as fig. 5 a and fig. 5b
Channel measurement schematic diagram five, Fig. 5 B are uplink multi-users channel measurement schematic diagram six)；It can be seen that, needed for shortening channel measurement
Time, improve channel measurement efficiency.
In channel measuring method embodiment five of the present invention, on the basis of above-described embodiment, at least two STA (such as N
Individual STA) it is divided at least two member's groups；The type of member's group includes：Many member's groups and/or single member's group；Wherein,
Many member's groups include at least two STA；Single member's group includes a STA；Accordingly, also include in the TF-S：
Each STA packet is indicated；Alternatively, each STA packet indicates to be carried in the common signaling domain of the TF-S, or is carried on
In each STA of TF-S signaling domain；For example, STA M packet indicates that the common signaling domain of the TF-S can be carried on
In, or be carried in the STA M signalings domain of the TF-S.Alternatively, it is described packet indicate can using bit indicate by the way of,
Each STA belonged in many member's groups uses up MU-MIMO simultaneous transmissions training sequence part, and (Fig. 6 A are as shown in Figure 6A
STA packet indicates schematic diagram), such as STA1 and STA2 are divided into member's group more than one, two STA in many member's groups
Training sequence part is sent using up MU-MIMO transmission mode simultaneously to AP, remaining STA in addition to many member's groups are belonged to is each
Belong to corresponding single member's group, each STA for belonging to single member's group sends respective training sequence portion at respective time point successively
Point.
Accordingly, in step S203, the STA M are according to being determined the corresponding parameter configured informations of the STA M
STA M spatial stream number NssM, spatial flow position and the STA M send NDP (alternatively, the NDP only include training sequence
Part) used in RUM；Further, the STA M are according to STA P (1≤P<M) corresponding parameter configured information and described
Packet indicates that (the packet situation that would know that the STA P and the STA M) determines the first transmission time TM；Wherein, it is described
First sends the transmission time that the time is the STA M transmissions NDP (i.e. training sequence part).Alternatively, the STA M
The spatial stream number N of the STA P is determined according to the corresponding parameter configured informations of the STA PssP, and indicated according to the packet
The STA P and the STA M packet situation are determined, further, according to the spatial stream number NssPAnd packet situation is true
Fixed first sends time TM。
Assuming that N number of STA is divided into some member's groups, remember that the collection for the STA sequence numbers that each member's group is included is combined into φ1,
φ2,...,φG, then determine that STA M (1≤M≤N) send the first of training sequence part and send time T according to formula sevenM, its
In, formula seven is：
Wherein,For position
Member's group (G before STA M1<G).As shown in Figure 6A, φ1={ 1,2 }, φ2={ 3 }, φ3={ 4 } ..., φN-1={ N },
1) STA 1 and STA2 sends the first of training sequence part and sends time T1And T2All it is T0+xIFS；2)STA M(2<M≤N) send
The first of training sequence part sends the time
Accordingly, in step S204, the type that STA M members according to belonging to the packet indicates determination organize；Its
In, the type of member's group includes a following type：Many member's groups and single member's group；If 1) the STA M belong to described
Many member's groups (such as M is 1 and 2), then the STA M send time T described firstMPass through the RUM, using MU-MIMO technologies
The NDP is sent to the AP；If the STA belongs to single member's group (such as 2<M≤N), then the STA M are described first
Transmission time TMPass through the RUMThe NDP is sent to the AP；Wherein, STA adjacent with the STA M NDP is (such as
STA M-1 and STA M+1) transmitted by NDP between without interframe space.
Accordingly, in step S205, the AP uses MU-MIMO technologies, receives each STA for belonging to many member's groups
(such as STA 1 and STA2) sends time T firstM(such as M is 1 and 2) only includes according to what corresponding transmission parameter was sent simultaneously
The NDP of training sequence part, and receive the STA M (2 for belonging to single member's group<M≤N) send time T corresponding firstM
(such as 2<M≤N) only include the NDP of training sequence part according to what corresponding transmission parameter was sent successively, wherein, any two phase
Without interframe space between the NDP that adjacent STA is sent；As shown in Figure 6B (Fig. 6 B are uplink multi-users channel measurement schematic diagram seven)；Can
See, shorten the time needed for channel measurement, improve channel measurement efficiency.
In channel measuring method embodiment six of the present invention, on the basis of above-described embodiment, at least two STA (such as N
Individual STA) at least two members are divided into, wherein, the type of member's group includes：Many member's groups and/or single member's group；Its
In, many member's groups include at least two STA；Single member's group includes a STA；Accordingly, also wrapped in the TF-S
Include：Each STA packet is indicated；Alternatively, each STA packet indicates to be carried in the common signaling domain of the TF-S, or takes
Band is in each STA of TF-S signaling domain.Alternatively, the packet indicates that institute can be belonged to by the way of bit instruction
State each STA in many member's groups and send common preamble part to AP simultaneously, and sequence is trained using up MU-MIMO simultaneous transmissions
Part is arranged, as shown in Figure 6A, such as STA1 and STA2 are divided into member's group more than one, and two STA in many member's groups are same
When send common preamble part to AP, and training sequence part is sent to AP using up MU-MIMO transmission mode simultaneously, except category
Corresponding single member's group is each belonged in remaining STA outside many member's groups, belongs to each STA of single member group successively when respective
Between point send respective NDP (including common preamble part and training sequence part).
Accordingly, in step S203, the STA M are according to being determined the corresponding parameter configured informations of the STA M
STA M spatial stream number NssM, spatial flow position and the STA M send NDP (alternatively, the NDP include common preamble portion
Point and training sequence part) used in RUM；Further, the STA M are according to STA P (1≤P<M) corresponding parameter is indicated
Information and the packet indicate that (the packet situation that would know that the STA P and the STA M) determined for the first transmission time
TM；Wherein, described first time T is sentMIncluding：When the STA M send the second transmission of the common preamble part of the NDP
Between TM1And the STA M send the 3rd of the training sequence part of the NDP and send time TM2.Alternatively, the STA M
The spatial stream number N of the STA P is determined according to the corresponding parameter configured informations of the STA PssP, and indicated according to the packet
The STA P and the STA M packet situation are determined, further, according to the spatial stream number NssPAnd packet situation is true
Fixed first sends time TM。
Assuming that N number of STA is divided into some member's groups, remember that the collection for the STA sequence numbers that each member's group is included is combined into φ1,
φ2,...,φG, then determine that STA M (1≤M≤N) send the first of NDP and send time T according to formula eightM(TM1=TM, TM2=
TM+ΔTA), wherein, formula eight is：
Wherein,For member's group (G before STA M1<G).As shown in Figure 6A, φ1={ 1,2 }, φ2={ 3 }, φ3=
{4},...,φN-1={ N }, 1) STA 1 and STA2 send the second of common preamble part and send time T11And T21All it is T0+
XIFS, STA 1 and STA2 sends the 3rd transmission time T of training sequence part12And T22All it is T0+xIFS+ΔTA；2)STA M
(2<M≤N) send the second of common preamble part and send time TM1It is equal to：
STA M(2<M≤N) send training sequence part the 3rd send time TM2=TM+ΔTA。
Accordingly, in step S204, the type that STA M members according to belonging to the packet indicates determination organize；Its
In, the type of member's group includes a following type：Many member's groups and single member's group；If 1) the STA M belong to described
Many member's groups (such as M is 1 and 2), then the STA M send time T described secondM1At least through the RUMOccupied band
Width, the common preamble part of the NDP is sent to the AP；And send time T the described 3rdM2Pass through the RUM, use
MU-MIMO technologies send the training sequence part of the NDP to the AP；If 2) the STA M belong to single member's group (such as
2<M≤N), then the STA M send time T described secondM1At least through the RUMOccupied bandwidth, sends out to the AP
Send the common preamble part of the NDP；And send time T the described 3rdM2Pass through the RUMThe NDP is sent to the AP
Training sequence part；Wherein, transmitted by STA adjacent with the STA M NDP (such as STA M-1 and STA M+1)
Without interframe space between NDP.
Accordingly, in step S205, the AP receives each STA (such as STA 1 and STA2) for belonging to many member's groups
Time T is sent secondM1The common preamble part for the NDP that (such as M is 1 and 2) sends simultaneously according to corresponding transmission parameter, and adopt
Each STA for belonging to many member's groups is received with MU-MIMO technologies in the 3rd transmission time TM2(such as M is 1 and 2) is according to corresponding
Send the training sequence part for the NDP that parameter is sent simultaneously；And receive the STA M (2 for belonging to single member's group<M
≤ N) in the corresponding first transmission time, (such as STA M are in TMMoment ... STA, N was in TNMoment) (such as 2<M≤N) according to corresponding hair
Send the NDP including common preamble part and training sequence part that parameter (such as corresponding RU) is sent successively；Wherein, any two
Without interframe space between the NDP that adjacent S TA is sent, as shown in Figure 7 (Fig. 7 is uplink multi-users channel measurement schematic diagram eight).
In channel measuring method embodiment seven of the present invention, on the basis of above-described embodiment, at least two STA (such as N
Individual STA) at least two member's groups are divided into, wherein, the type of member's group includes：Many member's groups and/or single member's group；
Wherein, many member's groups include at least two STA；Single member's group includes a STA；Accordingly, in the TF-S also
Including：Each STA packet is indicated；Alternatively, each STA packet indicates to be carried in the common signaling domain of the TF-S, or
In the signaling domain for being carried on each STA of the TF-S.Alternatively, the packet indicates by the way of bit instruction to belong to
Each STA in many member's groups uses up MU-MIMO simultaneous transmissions training sequence part, as shown in Figure 6A, such as STA1 and
STA2 is divided into member's group more than one, and two STA in many member's groups are using up MU-MIMO transmission mode simultaneously to AP
Training sequence part is sent, remaining STA in addition to many member's groups are belonged to each belongs to corresponding single member's group, belongs to single member's group
Each STA send respective training sequence part at respective time point successively；Wherein, each STA sends common preamble part
Mode it is identical with the mode that common preamble part is sent in above-described embodiment four, here is omitted.
Accordingly, in step S203, the STA M are according to being determined the corresponding parameter configured informations of the STA M
STA M spatial stream number NssM, spatial flow position and the STA send NDP (alternatively, the NDP include：Common preamble part
And training sequence part) used in RUM；Further, the STA M are according to STA P (1≤P<M) corresponding parameter indicates letter
Breath and the packet indicate that (the packet situation that would know that the STA P and the STA M) determined for the 4th transmission time Tc
Time T is sent with the 5thM；Wherein, the described 4th time T is sentcThe common preamble part of the NDP is sent for the STA M
The transmission time, the described 5th sends time TMThe transmission time of the training sequence part of the NDP is sent for the STA M.Can
Selection of land, the STA M determine the spatial stream number N of the STA P according to the corresponding parameter configured informations of the STA PssP, and root
Indicate to determine the packet situation of the STA P and STA M according to the packet, further, according to the spatial stream number NssP
And packet situation determined for the 4th transmission time TcTime T is sent with the 5thM。
Assuming that N number of STA is divided into some member's groups, remember that the collection for the STA sequence numbers that each member's group is included is combined into φ1,
φ2,...,φG, remember that each STA sends the 4th of common preamble part and sends time T jointlyc=T0+ xIFS, then can be according to public affairs
Formula nine determines that STA M (1≤M≤N) send the 5th of training sequence part and send time TM, wherein, formula nine is：
Wherein,For member's group (G before STA M1<G).As shown in Figure 6A, φ1={ 1,2 }, φ2={ 3 }, φ3=
{4},...,φN-1={ N }, 1) STA 1 and STA2 send the 5th of training sequence part and send time T1And T2All it is T0+xIFS
+ΔTA；2)STA M(2<M≤N) send training sequence part the 5th send time TMIt is equal to：
Accordingly, in step S204, further, STA M member's groups according to belonging to the packet indicates determination
Type；Wherein, the type of member's group includes a following type：Many member's groups and single member's group；If 1) the STA M
Belong to many member's groups (such as M is 1 and 2), then the STA M send time T the described 4thcAt least through the RUMIt is shared
According to bandwidth, the common preamble part of the NDP is sent to the AP；And send time T the described 5thMPass through the RUM,
The training sequence part of the NDP is sent to the AP using MU-MIMO technologies；If 2) the STA M belong to single member
Group (such as 2<M≤N), then the STA M send time T the described 4thcAt least through the RUMOccupied bandwidth, to described
AP sends the common preamble part of the NDP；And send time T the described 5thMPass through the RUMSend described to the AP
NDP training sequence part；Wherein, STA adjacent with the STA M NDP (such as STA M-1 and STA M+1) is transmitted
Training sequence part between without interframe space, common preamble part and STA 1 (the i.e. first STA) transmissions of the NDP
Without interframe space between training sequence part.
Accordingly, in step S205, the AP receives each STA and sends time T the 4thcAccording to corresponding transmission parameter
The NDP sent simultaneously common preamble part, and each STA of many member's groups is belonged to (such as using the reception of MU-MIMO technologies
STA 1 and STA2) send time T the 5thMThe training for the NDP that (such as M is 1 and 2) sends simultaneously according to corresponding transmission parameter
Sequence；The AP receives each STA M (2 for belonging to single member's group in addition<M≤N) send the time the corresponding 5th
(such as STA M are in TMMoment) (such as 2<M≤N) pass through corresponding transmission parameter (such as RUM) the NDP training sequence portion that sends successively
Point；Wherein, without interframe between the training sequence part that the common preamble part of the NDP and STA 1 (i.e. first STA) are sent
Without interframe space between interval, the training sequence part that any two adjacent S TA is sent, (Fig. 8 is up multi-purpose as shown in Figure 8
Family channel measurement schematic diagram nine).
Alternatively, the TF-S can be a single data frame, or be contained within other data frames.Usual feelings
Under condition, the TF-S is contained in physical layer protocol data unit (Physical Protocol Data Unit, abbreviation PPDU)
Data division (TF-S is one kind of mac frame), due to for indicating that the configured information of TF-S frame types is contained in MAC packet header,
STA is when receiving the TF-S of AP transmissions, and the STA, which must be decoded to MAC parts, can just know that the type of the frame is TF-S.When
Include current Basic Service Set (Basic in the signaling domain A of the PPDU of preceding 802.11ax forms physical layer preamble part
Service Unit, abbreviation BSS) color configured information；If AP sends TF-S using the PPDU of 802.11ax forms, weight
The STA of folded Basic Service Set (Overlapping Basic Service Unit, abbreviation OBSS) receives the PPDU comprising TF-S
And behind decoded PHY packet header, the BSS colouring informations according to included in the signaling domain A of physical layer preamble can know the PPDU
It is not cell where the STA, therefore, the remainder that the STA can abandon decoding the PPDU (will not be decoded and included
TF-S in MAC parts), the STA does not just know that the data division of the PPDU includes TF-S, if then the STA carries out space
Multiplexing, may interfere the uplink for other STA that TF-S is triggered.
Therefore, proposed in the embodiment of the present invention：Trigger frame configured information is included in the physical layer preamble part of the PPDU,
The trigger frame configured information be used for indicate the PPDU data division whether containing type be TF-S media access control
Mac frame；When STA receives the PPDU of AP transmissions, the STA just can be obtained in the physical layer preamble part for having decoded the PPDU
Know whether the data division of the PPDU includes TF-S, consequently facilitating carrying out data transmission or reasonably keeping out of the way.Alternatively,
In the above embodiment of the present invention, before step S202, the STA determines the PPDU's according to the trigger frame configured information
Data division containing type is TF-S mac frame.
Alternatively, the trigger frame configured information is carried in the signaling domain A of PPDU physical layer preamble part.Table 1 is
Signaling domain A content in 802.11ax descending SU PPDU physical layer preamble part, as shown in table 1, alternatively, can be in letter
Make added in the A of domain signaling domain be used to indicating the PPDU data division whether containing type for TF-S mac frame or
The trigger frame configured information is carried in spatial reuse domain or the number of the PPDU is indicated by being multiplexed some signaling domain
According to part whether containing type be TF-S mac frame.Certainly, the trigger frame configured information can be also carried otherwise,
The embodiment of the present invention is not restricted to this.
Signaling domain A content in table 1,802.11ax descending SU PPDU physical layer preamble part
Signaling domain A content in the physical layer preamble part that table 2 is 802.11ax descending MU PPDU, as shown in table 2,
Alternatively, can be added in the A of signaling domain a signaling domain be used for indicate the PPDU data division whether containing type be TF-
S mac frame or the trigger frame configured information is carried in spatial reuse domain or is referred to by being multiplexed some signaling domain
Show the PPDU data division whether containing type be TF-S mac frame.Certainly, described touch can be also carried otherwise
Frame configured information is sent out, the embodiment of the present invention is not restricted to this.
Signaling domain A content in table 2,802.11ax descending MU PPDU physical layer preamble part
Fig. 9 is the schematic flow sheet of carrier sense indicating means embodiment of the present invention.As shown in figure 9, the side of the present embodiment
Method can include：
S901, AP send trigger frame at least one STA.
In the embodiment of the present invention, AP sends trigger frame at least one site STA；Wherein, the trigger frame includes：Institute
State the corresponding carrier senses of STA (such as the first STA) to indicate, the carrier sense indicates to be used to indicate whether the STA is carried
Ripple is intercepted；Wherein, if the carrier sense indicates to be used to indicate that the STA need not carry out carrier sense, the STA directly to
The STA sends physical layer protocol data unit PPDU, the channel status without considering carrier sense；If the carrier sense refers to
Show that then the STA can carry out carrier sense before PPDU is sent to the AP for indicating that the STA carries out carrier sense
(carrier sense can certainly be determined whether by the STA without carrier sense).1) alternatively, wrapped in the trigger frame
A carrier sense instruction is included, the carrier sense indicates to be used to indicate whether each STA carries out carrier sense, optional
Ground, the carrier sense indicates to be carried in the common signaling domain of the trigger frame；2) alternatively, wrapped in the trigger frame
Include：Each corresponding carrier senses of the STA indicate that each corresponding carrier senses of the STA indicate corresponding for indicating
Whether STA carries out carrier sense, alternatively, and each corresponding carrier senses of the STA indicate that the trigger frame can be carried on
Common signaling domain in, or be carried in the STA of trigger frame signaling domain.Alternatively, the carrier sense bag
Include Physical carrier sense and virtual carrier sensing in wireless network communication；Wherein, the description as described in Physical carrier sense and virtual carrier sensing in wireless network communication refers to this
Invention above-described embodiment, here is omitted.
What S902, the first STA the reception AP were sent carries the described of the corresponding carrier sense instructions of the first STA
Trigger frame.
S903, the first STA indicate to determine whether to carry out carrier sense according to the carrier sense.
In this step, the first STA indicates to determine whether to carry out carrier sense according to the carrier sense；If 1) described
Carrier sense indicates to be used to indicate that the first STA need not carry out carrier sense, i.e., described first STA determines that carrier wave need not be carried out
Intercept, then the first STA directly sends PPDU to respond the trigger frame to the AP, the channel without considering carrier sense
State；If 2) carrier sense indicates to be used for indicate that the first STA carries out carrier sense, the first STA is to institute
State AP send PPDU (can not certainly carrier sense, described the so that carrier sense can be carried out before responding the trigger frame
One STA determines whether carrier sense；Alternatively, the carrier sense includes Physical carrier sense and virtual carrier sensing in wireless network communication)；2a)
When the first STA determines carrier sense and when it is determined that carrier sense result is channel idle, the first STA is to the AP
Send PPDU；2b) when the first STA determines carrier sense, and carrier sense result is when being channel busy, then described first
STA does not send PPDU to the AP；It is 2c) when the first STA determines not carrier sense (without considering channel status), then described
First STA directly sends PPDU to the AP.
S904, the AP receive the PPDU that at least one described first STA is sent；Wherein, the first STA for it is described extremely
Equipment in a few STA.
In this step, the AP is received that at least one described first STA is directly transmitted or is being detected channel idle
Transmitted PPDU afterwards.It can be seen that, in the embodiment of the present invention, AP to each STA by sending the triggering indicated comprising carrier sense
Frame, so that each STA indicates to determine whether to carry out carrier sense according to carrier sense；Compared to carrying out in the prior art every time
The mode of carrier sense, carrier sense indicating means of the invention is more flexible, so as to improve data transmission efficiency.
Alternatively, trigger frame can be a single data frame, or be contained within other data frames.Normal conditions
Under, the trigger frame may be included in PPDU data division, due to the instruction for being used to indicate trigger frame frame type in the prior art
Information is contained in MAC packet header, and STA is when receiving the PPDU of AP transmissions, and the STA must be decoded to MAC parts and can just obtain
Know the type of the trigger frame；Alternatively, the trigger frame can be TF-S (Trigger Frame for Sounding) or
TF-R (Trigger Frame for Random Access) etc..The PPDU of current 802.11ax forms physical layer preamble portion
Include the configured information of BSS colors in the signaling domain A divided；If AP sends triggering using the PPDU of 802.11ax forms
Frame, OBSS STA is received behind the PPDU comprising trigger frame and decoded PHY packet header, according in the signaling domain A of physical layer preamble
Comprising BSS colouring informations can know that the PPDU is not cell where the STA, therefore, the STA can abandon decoding
The remainder (will not decode the trigger frame for being contained in MAC parts) of the PPDU, the STA does not just know the number of the PPDU
The trigger frame type included according to part, if then the STA carries out spatial reuse, may interfere what the trigger frame was triggered
Other STA uplink.
Therefore, proposed in the embodiment of the present invention：Trigger frame configured information is included in the physical layer preamble part of the PPDU,
The trigger frame configured information is used for the type for indicating the trigger frame；When STA receives the PPDU of AP transmissions, the STA
The trigger frame type that the PPDU is included just is would know that in the physical layer preamble part for having decoded the PPDU, consequently facilitating entering
Row data transfer is either reasonably kept out of the way.
Figure 10 is the schematic flow sheet of trigger frame indicating means embodiment of the present invention.As shown in Figure 10, the side of the present embodiment
Method can include：
S1001, AP send PPDU to STA.
Wherein, the data division of the PPDU is included in trigger frame, the physical layer preamble part of the PPDU comprising triggering
Frame configured information, the trigger frame configured information is used for the type for indicating the trigger frame；Alternatively, the trigger frame indicates letter
Breath is carried in the signaling domain A of the physical layer preamble part.
As shown in above-mentioned table 1 or table 2, alternatively, a signaling domain can be added in the A of signaling domain to be used to indicate the triggering
The type of frame or the trigger frame configured information is carried in spatial reuse domain or is referred to by being multiplexed some signaling domain
Show the type of the trigger frame.Certainly, the trigger frame configured information, the embodiment of the present invention pair can be also carried otherwise
This is not restricted.
S1002, the STA receive the PPDU that the AP is sent.
S1003, the STA read the trigger frame according to the trigger frame configured information, and send response to the AP
Frame.
In this step, the trigger frame that the STA is included according to the physical layer preamble part of the PPDU indicates to believe
Breath just would know that the type of the trigger frame, and read the trigger frame, and then described to respond to AP transmission response frames
PPDU。
S1004, the AP receive the response frame that the STA is sent.
It can be seen that, in the embodiment of the present invention, it is used to indicate described touch due to including in the physical layer preamble part of the PPDU
The trigger frame configured information of the type of frame is sent out, when STA receives PPDU, by the physical layer preamble part for reading the PPDU
Just the type for the trigger frame that the PPDU is included is would know that, consequently facilitating more neatly carrying out data transmission.
Figure 11 is the structural representation of means for channel measurement embodiment one of the present invention, and AP includes the means for channel measurement,
Alternatively, the Channel Processing device can be realized by software and/or hardware.As shown in figure 11, the letter that the present embodiment is provided
Road measurement apparatus 110 includes：
Sending module 1101, for sending channel measurement trigger frame TF-S at least two site STAs；Wherein, the TF-
S sends the empty data frame NDP measured for up channel for triggering at least two STA；The TF-S includes：Each
The STA sends the parameter configured information for the transmission parameter that the NDP is used, and the parameter configured information is used for the STA
Determine transmission parameter and transmission time；
Receiving module 1102, for receiving STA described at least two respectively in the corresponding transmission time roots of each described STA
The NDP that parameter is sent is sent according to the STA is corresponding, and carries out channel measurement；Wherein, any two in STA described at least two
Without interframe space between NDP transmitted by individual adjacent S TA.
Further, each STA sends the parameter configured information for the transmission parameter that the NDP is used including following
One of information or any combination：
Access identity card AID, the spatial flow configured information of the STA and the STA of the STA sends the NDP institutes
Channel resource units RU configured informations；
Wherein, the AID of the STA is used to indicate that the STA needs to send NDP to the AP；The spatial flow of the STA refers to
Show that information includes the configured information that the STA sends the training sequence part in the NDP to the AP.
Further, also include in the TF-S：The corresponding carrier sense of each STA is indicated；The carrier sense indicates to use
Whether carrier sense is carried out in the instruction STA；Wherein, if the carrier sense indicates that the STA need not carry out carrier wave
Intercept, then the STA directly sends NDP to the AP；If the carrier sense indicates that the STA carries out carrier sense,
Then the STA carries out carrier sense before NDP is sent to the AP.
Further, the TF-S is contained in physical layer protocol data unit PPDU data division；Wherein, the PPDU
Physical layer preamble part in include trigger frame configured information, the trigger frame configured information be used for indicate that the data division is
No containing type is TF-S media access control mac frame.
Further, the common signaling domain of the TF-S includes type indication information；Wherein, the type indication information
For indicating that the type of trigger frame is TF-S.
Further, the receiving module 1102 specifically for：Each described STA is received in the corresponding first transmission time
The NDP sent successively according to corresponding transmission parameter, wherein, the NDP includes：Common preamble part and training sequence part,
Or, the NDP includes：Training sequence part.
Further, the receiving module 1102, including：
First receiving unit, for receive each described STA the 4th transmission time according to it is corresponding transmission parameter simultaneously
The NDP of transmission common preamble part；Described 4th sends the common preamble part that the time is each STA transmissions NDP
The transmission time；
Second receiving unit, joins for receiving each described STA in the corresponding 5th transmission time according to corresponding send
The training sequence part for the NDP that number is sent successively；It is described for STA transmissions that each described STA the corresponding 5th sends the time
The transmission time of NDP training sequence part；
Wherein, without between interframe between the training sequence part that the common preamble part of the NDP and first STA are sent
Every, and without interframe space between the training sequence part of any two adjacent S TA transmissions；First STA for it is described extremely
The STA of first transmission training sequence part in few two STA.
Further, at least two STA is divided at least two member's groups；The type of member's group includes：
Many member's groups and/or single member's group；Wherein, many member's groups include at least two STA；Single member's group includes one
STA；Accordingly, also include in the TF-S：Each STA packet is indicated；
The receiving module 1102, including：
3rd receiving unit, for using multi-user's multiple-input and multiple-output MU-MIMO technologies, reception belongs to many members
Each STA of group sends NDP of the time according to corresponding transmission parameter transmission simultaneously first；Wherein, described first the time is sent
The NDP transmission time is sent for each STA；
4th receiving unit, belong to for receiving each STA of the single member group the corresponding first transmission time according to
It is corresponding to send the NDP that parameter is sent successively；Each STA corresponding first sends the hair that the time is STA transmissions NDP
Send the time；
Wherein, the NDP includes：Training sequence part.
Further, at least two STA is divided at least two member's groups；The type of member's group includes：
Many member's groups and/or single member's group；Wherein, many member's groups include at least two STA；Single member's group includes one
STA；Accordingly, also include in the TF-S：Each STA packet is indicated；
The receiving module 1102, including：
5th receiving unit, each STA of many members group is belonged to for receiving in the second transmission time according to corresponding
The common preamble part for the NDP that parameter is sent simultaneously is sent, and each of many member's groups is belonged to using the reception of MU-MIMO technologies
STA sends the time according to corresponding transmission parameter while the NDP sent training sequence part the 3rd；Wherein, it is described
Second sends the transmission time for the time NDP common preamble part being sent for each STA；The 3rd transmission time is described
Each STA sends the transmission time of NDP training sequence part；
6th receiving unit, belong to for receiving each STA of the single member group the corresponding first transmission time according to
It is corresponding to send the NDP that parameter is sent successively；The NDP includes：Common preamble part and training sequence part.
Further, at least two STA is divided at least two member's groups；The type of member's group includes：
Many member's groups and/or single member's group；Wherein, many member's groups include at least two STA；Single member's group includes one
STA；Accordingly, also include in the TF-S：Each STA packet is indicated；
The receiving module 1102, including：
7th receiving unit, sends simultaneously for receiving each STA in the 4th transmission time according to corresponding transmission parameter
NDP common preamble part；Described 4th sends the transmission time for the time NDP common preamble part being sent for each STA；
8th receiving unit, for using MU-MIMO technologies, receives each STA for belonging to many member's groups in the 5th hair
Send the time according to corresponding transmission parameter while the NDP sent training sequence part；Wherein, the 5th transmission time is institute
State the transmission time that each STA sends NDP training sequence part；
9th receiving unit, belong to for receiving each STA of the single member group the corresponding 5th transmission time according to
The corresponding training sequence part for sending the NDP that parameter is sent successively；Each the STA corresponding 5th transmission times are described
STA sends the transmission time of NDP training sequence part；
Wherein, without between interframe between the training sequence part that the common preamble part of the NDP and first STA are sent
Every, and without interframe space between the training sequence part of any two adjacent S TA transmissions；First STA for it is described extremely
The STA of first transmission training sequence part in few two STA.
Further, the sending module 1101 specifically for：To described at least two at least on main pre-set bandwidths channel
Individual STA sends TF-S.
The means for channel measurement of the embodiment of the present invention can be used for performing in above-mentioned channel measuring method embodiment of the invention
Technical scheme, its implementing principle and technical effect is similar, and here is omitted.
Figure 12 is the structural representation of means for channel measurement embodiment two of the present invention, and the first STA includes the channel measurement
Device, alternatively, the Channel Processing device can be realized by software and/or hardware.As shown in figure 12, the present embodiment is provided
Means for channel measurement 120 include：
Receiving module 1201, the channel measurement trigger frame TF-S for receiving access point AP transmissions；Wherein, the TF-S is used
The empty data frame NDP measured for up channel is sent at least two STA of triggering；The TF-S includes：Each STA
Send the parameter configured information for the transmission parameter that the NDP is used；Wherein, the first STA belongs to described at least two
STA；
First determining module 1202, for determining to send parameter according to the parameter configured information and sending the time；
Sending module 1203, for sending NDP to the AP according to the transmission parameter in the transmission time；Wherein,
Without interframe space between NDP transmitted by any STA adjacent with the STA NDP.
Further, each STA sends the parameter configured information for the transmission parameter that the NDP is used including following
One of information or any combination：
Access identity card AID, the spatial flow configured information of the STA and the STA of the STA sends the NDP institutes
Channel resource units RU configured informations；
Wherein, the AID of the STA is used to indicate that the STA needs to send NDP to the AP；The spatial flow of the STA refers to
Show that information includes the configured information that the STA sends the training sequence part in the NDP to the AP.
Further, also include in the TF-S：The corresponding carrier sense of each STA is indicated；The carrier sense indicates to use
Whether carrier sense is carried out in the instruction STA；Wherein, if the carrier sense indicates that the STA need not carry out carrier wave
Intercept, then the STA directly sends NDP to the AP；If the carrier sense indicates that the STA carries out carrier sense,
Then the STA carries out carrier sense before NDP is sent to the AP.
Further, the means for channel measurement 130 also includes：
Second determining module, for being indicated to determine whether to carry out carrier sense according to the carrier sense；
Accordingly, the sending module 1203 specifically for：
When second determining module determines to carry out carrier sense, or determine to need to carry out carrier sense and intercept
When being as a result channel idle, NDP is sent to the AP according to the transmission parameter in the transmission time.
Further, the common signaling domain of the TF-S includes type indication information；Wherein, the type indication information
For indicating that the type of trigger frame is TF-S.
Further, the TF-S is contained in physical layer protocol data unit PPDU data division；Wherein, the PPDU
Physical layer preamble part in include trigger frame configured information, the trigger frame configured information be used for indicate that the data division is
No containing type is TF-S media access control mac frame.
Further, the means for channel measurement 120 also includes：
3rd determining module, the data division containing type for determining the PPDU according to the trigger frame configured information
For TF-S mac frame.
Further, first determining module 1202, including：
First determining unit, the sky for determining the first STA according to the corresponding parameter configured informations of the first STA
Between fluxion Nss, spatial flow position and the first STA send RU used in NDP；Wherein, the NDP includes：Training sequence portion
Point；
Second determining unit, for determining for the first transmission time according to the corresponding parameter configured informations of the 2nd STA；Wherein,
2nd STA includes：STA in the signaling domain of the TF-S before the signaling domain of the first STA；First hair
The time is sent to send the transmission time of the NDP for the first STA；
Accordingly, the sending module 1203 specifically for：The time is sent by the RU to the AP described first
Send the NDP.
Further, the NDP also includes：Common preamble part；Accordingly, the first transmission time includes：It is described
First STA sends the second of the common preamble part of the NDP instruction for sending time and the first STA transmissions NDP
Practice Sequence the 3rd sends the time；
Accordingly, the sending module 1203 specifically for：
The time is sent at least through the bandwidth occupied by the RU described second, and the public affairs of the NDP are sent to the AP
Common leading part；
Send the training sequence part of the NDP to the AP by the RU in the described 3rd transmission time.
Further, first determining module 1202, including：
3rd determining unit, the sky for determining the first STA according to the corresponding parameter configured informations of the first STA
Between fluxion Nss, spatial flow position and the first STA send RU used in the NDP；Wherein, the NDP includes：Common preamble
Part and training sequence part；
4th determining unit, for determining the 4th transmission time and the 5th according to the corresponding parameter configured informations of the 2nd STA
The transmission time；Wherein, the 2nd STA includes：In the signaling domain of the TF-S before the signaling domain of the first STA
STA；Described 4th sends the transmission time that the time is the common preamble part that the first STA sends the NDP, the described 5th
The transmission time is the transmission time for the training sequence part that the first STA sends the NDP；
Accordingly, the sending module 1203 specifically for：
The time is sent at least through the bandwidth occupied by the RU the described 4th, and the public affairs of the NDP are sent to the AP
Common leading part；
Send the training sequence part of the NDP to the AP by the RU in the described 5th transmission time.
Further, also include in the TF-S：Each STA packet is indicated；
Accordingly, first determining module 1202, including：
5th determining unit, the sky for determining the first STA according to the corresponding parameter configured informations of the first STA
Between fluxion Nss, spatial flow position and the first STA send RU used in the NDP；Wherein, the NDP includes：Training sequence
Part；
6th determining unit, for indicating to determine the according to the corresponding parameter configured informations of the 2nd STA and the packet
One sends the time；Wherein, the 2nd STA includes：In the signaling domain of the TF-S before the signaling domain of the first STA
STA；Described first sends the transmission time that the time is the first STA transmissions NDP；
Accordingly, the sending module 1203 specifically for：
The type that the member according to belonging to the packet indicates determination organizes；Wherein, the type of member's group is included with next
Type：Many member's groups and single member's group；Many member's groups include at least two STA；Single member's group includes one
STA；
If the first STA belongs to many member's groups, the time is sent by the RU described first, using multi-purpose
Family multiple-input and multiple-output MU-MIMO technologies send the NDP to the AP；
If the first STA belongs to single member's group, the time is sent by the RU to the AP described first
Send the NDP.
Further, also include in the TF-S：Each STA packet is indicated；
Accordingly, first determining module 1202, including：
7th determining unit, the sky for determining the first STA according to the corresponding parameter configured informations of the first STA
Between fluxion Nss, spatial flow position and the first STA send RU used in the NDP；Wherein, the NDP includes：Common preamble
Part and training sequence part；
8th determining unit, for indicating to determine the according to the corresponding parameter configured informations of the 2nd STA and the packet
One sends the time；Wherein, the 2nd STA includes：In the signaling domain of the TF-S before the signaling domain of the first STA
STA；The first transmission time includes：First STA sends the second transmission time of the common preamble part of the NDP
And the first STA sends the 3rd of the training sequence part of the NDP and sends the time；
Accordingly, the sending module 1203 specifically for：
The type that the member according to belonging to the packet indicates determination organizes；Wherein, the type of member's group is included with next
Type：Many member's groups and single member's group；Many member's groups include at least two STA；Single member's group includes one
STA；
If the first STA belongs to many member's groups, the time is sent at least through shared by the RU described second
According to bandwidth, the common preamble part of the NDP is sent to the AP；
The time is sent by the RU the described 3rd, sends the training of the NDP to the AP using MU-MIMO technologies
Sequence；
If the first STA belongs to single member's group, the time is sent at least through shared by the RU described second
According to bandwidth, the common preamble part of the NDP is sent to the AP；
Send the training sequence part of the NDP to the AP by the RU in the described 3rd transmission time.
Further, also include in the TF-S：Each STA packet is indicated；
Accordingly, first determining module 1202, including：
9th determining unit, the sky for determining the first STA according to the corresponding parameter configured informations of the first STA
Between fluxion Nss, spatial flow position and the first STA send RU used in the NDP；Wherein, the NDP includes：Common preamble
Part and training sequence part；
Tenth determining unit, for indicating to determine the according to the corresponding parameter configured informations of the 2nd STA and the packet
Four send time and the 5th transmission time；Wherein, the 4th transmission time is that the first STA sends the public of the NDP
The transmission time of leading part, the described 5th sends the hair that the time is the training sequence part that the first STA sends the NDP
Send the time；
Accordingly, the sending module 1203 specifically for：
The type that the member according to belonging to the packet indicates determination organizes；Wherein, the type of member's group is included with next
Type：Many member's groups and single member's group；Many member's groups include at least two STA；Single member's group includes one
STA；
If the first STA belongs to many member's groups, the time is sent at least through shared by the RU the described 4th
According to bandwidth, the common preamble part of the NDP is sent to the AP；
The time is sent by the RU the described 5th, sends the training of the NDP to the AP using MU-MIMO technologies
Sequence；
If the first STA belongs to single member's group, the time is sent at least through shared by the RU the described 4th
According to bandwidth, the common preamble part of the NDP is sent to the AP；
Send the training sequence part of the NDP to the AP by the RU in the described 5th transmission time.
Further, the receiving module 1201 specifically for：The AP hairs are at least received on main pre-set bandwidths channel
The TF-S sent.
The means for channel measurement of the embodiment of the present invention can be used for performing in above-mentioned channel measuring method embodiment of the invention
Technical scheme, its implementing principle and technical effect is similar, and here is omitted.
Figure 13 is the structural representation of means for channel measurement embodiment three of the present invention, and AP includes the means for channel measurement,
Alternatively, the Channel Processing device can be realized by software and/or hardware.As shown in figure 13, the letter that the present embodiment is provided
Road measurement apparatus 130 includes：
Sending module 1301, for sending trigger frame at least one site STA；Wherein, the trigger frame includes：Institute
The corresponding carrier senses of STA are stated to indicate；The carrier sense indicates to be used to indicate whether the STA carries out carrier sense；If institute
State carrier sense to indicate to be used to indicate that the STA need not carry out carrier sense, then the STA directly sends physics to the STA
Layer protocol data cell PPDU；If the carrier sense indicates to be used to indicate that the STA carries out carrier sense, the STA exists
Carrier sense can be carried out before sending PPDU to the AP；
Receiving module 1302, the PPDU for receiving at least one the first STA transmissions；Wherein, the first STA is described
Equipment at least one STA.
The means for channel measurement of the embodiment of the present invention can be used for performing above-mentioned carrier sense indicating means implementation of the invention
Technical scheme in example, its implementing principle and technical effect are similar, and here is omitted.
Figure 14 is the structural representation of means for channel measurement example IV of the present invention, and the first STA includes the channel measurement
Device, alternatively, the Channel Processing device can be realized by software and/or hardware.As shown in figure 14, the present embodiment is provided
Means for channel measurement 140 include：
Receiving module 1401, the trigger frame for receiving access point AP transmissions；Wherein, the trigger frame includes：It is described
The corresponding carrier senses of first STA are indicated；The carrier sense indicates to be used to indicate whether the first STA carries out carrier wave and detect
Listen；
Determining module 1402, for being indicated to determine whether to carry out carrier sense according to the carrier sense；
Sending module 1403, if indicating to be used to indicate that the first STA need not carry out carrier wave and detect for the carrier sense
Listen, then directly send physical layer protocol data unit PPDU to the AP；
If the carrier sense indicates to be used to indicate that the first STA carries out carrier sense, sent to the AP
Carrier sense can be carried out before PPDU.
The means for channel measurement of the embodiment of the present invention can be used for performing above-mentioned carrier sense indicating means implementation of the invention
Technical scheme in example, its implementing principle and technical effect are similar, and here is omitted.
Figure 15 is the structural representation of means for channel measurement embodiment five of the present invention, and AP includes the means for channel measurement,
Alternatively, the Channel Processing device can be realized by software and/or hardware.As shown in figure 15, the letter that the present embodiment is provided
Road measurement apparatus 150 includes：
Sending module 1501, for sending physical layer protocol data unit PPDU to site STA；Wherein, the PPDU
Data division, which is included, includes trigger frame configured information in trigger frame, the physical layer preamble part of the PPDU, the trigger frame refers to
Show that information is used for the type for indicating the trigger frame；
Receiving module 1502, for receiving the response frame that the STA is sent.
The means for channel measurement of the embodiment of the present invention can be used for performing above-mentioned trigger frame indicating means embodiment of the invention
In technical scheme, its implementing principle and technical effect is similar, and here is omitted.
Figure 16 is the structural representation of means for channel measurement embodiment six of the present invention, and STA includes the means for channel measurement,
Alternatively, the Channel Processing device can be realized by software and/or hardware.As shown in figure 16, the letter that the present embodiment is provided
Road measurement apparatus 160 includes：
Receiving module 1601, the physical layer protocol data unit PPDU for receiving access point AP transmissions；Wherein, it is described
PPDU data division includes and trigger frame configured information is included in trigger frame, the physical layer preamble part of the PPDU, described to touch
Hair frame configured information is used for the type for indicating the trigger frame；
Sending module 1602, for reading the trigger frame according to the trigger frame configured information, and sends to the AP
Response frame.
The means for channel measurement of the embodiment of the present invention can be used for performing above-mentioned trigger frame indicating means embodiment of the invention
In technical scheme, its implementing principle and technical effect is similar, and here is omitted.
Figure 17 is the structural representation of AP embodiments of the present invention.As shown in figure 17, the AP 170 that the present embodiment is provided includes
Interface 1701, processing unit 1702 and memory 1703.Processing unit 1702 controls AP 170 operation, wherein, interface 1701
Data or message are sent under the control of processor 1701.Memory 1703 can include read-only storage and random access memory
Device, and provide instruction and data to processing unit 1702.The a part of of memory 1703 can also at random deposit including non-volatile row
Access to memory (NVRAM).AP 170 each component is coupled by bus system 1704, and wherein bus system 1704 is removed
Outside data/address bus, in addition to power bus, controlling bus and status signal bus in addition.But for the sake of clear explanation,
Various buses are all designated as bus system 1704 in figure.
The method that the embodiments of the present invention are disclosed can apply in processing unit 1702, or by processing unit 1702
Realize., can be by the integrated logic circuit or the finger of software form of the hardware in processing unit 1702 in implementation process
Order causes AP 170 to perform the operation in above-mentioned each method embodiment.Processing unit 1702 can be general processor, numeral letter
Number processor, application specific integrated circuit, field programmable gate array or other PLDs, discrete gate or transistor
Logical device, discrete hardware components, it is possible to achieve or disclosed each method, step and logic in the execution embodiment of the present invention
Block diagram.General processor can be microprocessor or any conventional processor etc..With reference to disclosed in the embodiment of the present invention
The step of method, can be embodied directly in hardware processor and perform completion, or be combined with the hardware in processor and software module
Perform completion.Software module can be positioned at random access memory, flash memory, read-only storage, and programmable read only memory or electricity can
In the ripe storage medium in this areas such as erasable programmable storage, register.The storage medium is located at memory 1703, processing
The instruction that unit 1702 is performed in memory 1703 causes the step of AP 170 performs above-mentioned each method；Its realization principle and technology
Effect refers to above-mentioned channel measuring method embodiment, and here is omitted.
Figure 18 is the structural representation of STA embodiments of the present invention.As shown in figure 18, the STA 180 that the present embodiment is provided is wrapped
Include interface 1801, processing unit 1802 and memory 1803；Alternatively, the STA 180 can be the in above-described embodiment
One STA.Processing unit 1802 controls STA 180 operation, wherein, interface 1801 sends data under the control of processor 1801
Or message.Memory 1803 can include read-only storage and random access memory, and provide instruction to processing unit 1802
And data.The a part of of memory 1803 can also include non-volatile row random access memory (NVRAM).STA's 180 is each
Individual component is coupled by bus system 1804, and wherein bus system 1804 is in addition to including data/address bus, in addition to electricity
Source bus, controlling bus and status signal bus in addition.But for the sake of clear explanation, various buses are all designated as bus in figure
System 1804.
The method that the embodiments of the present invention are disclosed can apply in processing unit 1802, or by processing unit 1802
Realize., can be by the integrated logic circuit or the finger of software form of the hardware in processing unit 1802 in implementation process
Order causes STA 180 to perform the operation in above-mentioned each method embodiment.Processing unit 1802 can be general processor, numeral letter
Number processor, application specific integrated circuit, field programmable gate array or other PLDs, discrete gate or transistor
Logical device, discrete hardware components, it is possible to achieve or disclosed each method, step and logic in the execution embodiment of the present invention
Block diagram.General processor can be microprocessor or any conventional processor etc..With reference to disclosed in the embodiment of the present invention
The step of method, can be embodied directly in hardware processor and perform completion, or be combined with the hardware in processor and software module
Perform completion.Software module can be positioned at random access memory, flash memory, read-only storage, and programmable read only memory or electricity can
In the ripe storage medium in this areas such as erasable programmable storage, register.The storage medium is located at memory 1803, processing
The instruction that unit 1802 is performed in memory 1803 causes the step of STA 180 performs above-mentioned each method；Its realization principle and skill
Art effect refers to above-mentioned channel measuring method embodiment, and here is omitted.
, can be by it in several embodiments provided by the present invention, it should be understood that disclosed apparatus and method
Its mode is realized.For example, device embodiment described above is only schematical, for example, the division of the unit, only
Only a kind of division of logic function, can there is other dividing mode when actually realizing, such as multiple units or component can be tied
Another system is closed or is desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or discussed
Coupling each other or direct-coupling or communication connection can be the INDIRECT COUPLINGs or logical of device or unit by some interfaces
Letter connection, can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are to cause a computer
Equipment (can be personal computer, server, or network equipment etc.) or processor (processor) perform the present invention each
The part steps of embodiment methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. it is various
Can be with the medium of store program codes.
Those skilled in the art can be understood that, for convenience and simplicity of description, only with above-mentioned each functional module
Division progress for example, in practical application, can distribute complete by different functional modules by above-mentioned functions as needed
Into the internal structure of device being divided into different functional modules, to complete all or part of function described above.On
The specific work process of the device of description is stated, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.
One of ordinary skill in the art will appreciate that：The various numeral numberings such as first, second be referred to herein are only to retouch
The differentiation of convenient progress is stated, the scope of the embodiment of the present invention is not intended to limit.
One with ordinary skill in the art would appreciate that in various embodiments of the present invention, the sequence number of above-mentioned each process
Size is not meant to the priority of execution sequence, and the execution sequence of each process should be determined with its function and internal logic, without answering
Implementation process to the embodiment of the present invention constitutes any limit.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (34)
1. a kind of channel measuring method, it is characterised in that including：
Access point AP sends channel measurement trigger frame TF-S at least two site STAs；Wherein, the TF-S is used to trigger described
At least two STA send the empty data frame NDP measured for up channel；The TF-S includes：Each STA sends institute
The parameter configured information for the transmission parameter that NDP is used is stated, the parameter configured information determines transmission parameter for the STA
And send the time；
It is corresponding according to the STA in each described STA corresponding transmission times respectively that the AP receives STA described at least two
The NDP that parameter is sent is sent, and carries out channel measurement；Wherein, in STA described at least two transmitted by any two adjacent S TA
NDP between without interframe space.
2. according to the method described in claim 1, it is characterised in that each STA sends the transmission ginseng that the NDP is used
Several parameter configured informations includes one of following information or any combination：
Access identity card AID, the spatial flow configured information of the STA and the STA of the STA is sent used in the NDP
Channel resource units RU configured informations；
Wherein, the AID of the STA is used to indicate that the STA needs to send NDP to the AP；The spatial flow of the STA indicates letter
Breath includes the configured information that the STA sends the training sequence part in the NDP to the AP.
3. method according to claim 1 or 2, it is characterised in that also include in the TF-S：The corresponding carrier wave of each STA
Intercept instruction；The carrier sense indicates to be used to indicate whether the STA carries out carrier sense；Wherein, if the carrier sense
Indicate that the STA need not carry out carrier sense, then the STA directly sends NDP to the AP；If the carrier sense refers to
Show that the instruction STA carries out carrier sense, then the STA carries out carrier sense before NDP is sent to the AP.
4. the method according to any one of claim 1-3, it is characterised in that the TF-S is contained in PHY number
According to unit PPDU data division；Wherein, trigger frame configured information is included in the physical layer preamble part of the PPDU, it is described to touch
Hair frame configured information be used to indicating the data division whether the media access control mac frame that containing type is TF-S.
5. the method according to any one of claim 1-4, it is characterised in that the common signaling domain of the TF-S includes
Type indication information；Wherein, the type that the type indication information is used to indicate trigger frame is TF-S.
6. the method according to any one of claim 1-5, it is characterised in that the AP receives STA described at least two
Respectively the NDP that parameter is sent is sent in each described STA corresponding transmission times according to the STA is corresponding, including：
The AP receives the NDP that each described STA is sent successively in the corresponding first transmission time according to corresponding transmission parameter,
Wherein, the NDP includes：Common preamble part and training sequence part, or, the NDP includes：Training sequence part.
7. the method according to any one of claim 1-5, it is characterised in that the AP receives STA described at least two
Respectively the NDP that parameter is sent is sent in each described STA corresponding transmission times according to the STA is corresponding, including：
The AP receives the public of the NDP that each described STA is sent simultaneously in the 4th transmission time according to corresponding transmission parameter
Leading part；Described 4th sends the transmission time for the time NDP common preamble part being sent for each described STA；
The AP receives the NDP that each described STA is sent successively in the corresponding 5th transmission time according to corresponding transmission parameter
Training sequence part；Each described STA the corresponding 5th sends the training sequence portion that the time is the STA transmissions NDP
The transmission time divided；
Wherein, without interframe space between the training sequence part that the common preamble part of the NDP and first STA are sent, and
And without interframe space between the training sequence part of any two adjacent S TA transmissions；First STA is described at least two
The STA of first transmission training sequence part in STA.
8. a kind of channel measuring method, it is characterised in that including：
First site STA receives the channel measurement trigger frame TF-S that access point AP is sent；Wherein, the TF-S is used to trigger at least
Two STA send the empty data frame NDP measured for up channel；The TF-S includes：Each STA sends described
The parameter configured information for the transmission parameter that NDP is used；Wherein, the first STA belongs at least two STA；
First STA is determined to send parameter and is sent the time according to the parameter configured information；
First STA sends NDP according to the transmission parameter in the transmission time to the AP；Wherein, the NDP and institute
State between the NDP transmitted by the adjacent any STA of STA without interframe space.
9. method according to claim 8, it is characterised in that each STA sends the transmission ginseng that the NDP is used
Several parameter configured informations includes one of following information or any combination：
Access identity card AID, the spatial flow configured information of the STA and the STA of the STA is sent used in the NDP
Channel resource units RU configured informations；
Wherein, the AID of the STA is used to indicate that the STA needs to send NDP to the AP；The spatial flow of the STA indicates letter
Breath includes the configured information that the STA sends the training sequence part in the NDP to the AP.
10. method according to claim 8 or claim 9, it is characterised in that also include in the TF-S：The corresponding carrier wave of each STA
Intercept instruction；The carrier sense indicates to be used to indicate whether the STA carries out carrier sense；Wherein, if the carrier sense
Indicate that the STA need not carry out carrier sense, then the STA directly sends NDP to the AP；If the carrier sense refers to
Show that the instruction STA carries out carrier sense, then the STA carries out carrier sense before NDP is sent to the AP.
11. method according to claim 10, it is characterised in that the first STA is in the transmission time according to described
Transmission parameter is sent to the AP before NDP, in addition to：
First STA indicates to determine whether to carry out carrier sense according to the carrier sense；
Accordingly, the first STA sends NDP according to the transmission parameter in the transmission time to the AP, including：
When the first STA determines to carry out carrier sense, or determine to need to carry out carrier sense and intercepted result is letter
When road is idle, the first STA sends NDP according to the transmission parameter in the transmission time to the AP.
12. the method according to any one of claim 8-11, it is characterised in that the common signaling domain Zhong Bao of the TF-S
Include type indication information；Wherein, the type that the type indication information is used to indicate trigger frame is TF-S.
13. the method according to any one of claim 8-11, it is characterised in that the TF-S is contained in PHY
Data cell PPDU data division；Wherein, trigger frame configured information is included in the physical layer preamble part of the PPDU, it is described
Trigger frame configured information be used for indicate the data division whether containing type be TF-S media access control mac frame.
14. method according to claim 13, it is characterised in that first site STA receives what access point AP was sent
Before channel measurement trigger frame TF-S, in addition to：
First STA determines that the data division containing type of the PPDU is TF-S's according to the trigger frame configured information
Mac frame.
15. the method according to any one of claim 8-14, it is characterised in that the first STA is according to the parameter
Configured information determines transmission parameter and transmission time, including：
First STA determines the spatial stream number N of the first STA according to the corresponding parameter configured informations of the first STAss、
Spatial flow position and the first STA send the RU used in NDP；Wherein, the NDP includes：Training sequence part；
First STA determined for the first transmission time according to the corresponding parameter configured informations of the 2nd STA；Wherein, the 2nd STA
Including：STA in the signaling domain of the TF-S before the signaling domain of the first STA；The first transmission time is institute
State the transmission time that the first STA sends the NDP；
Accordingly, the first STA sends NDP according to the transmission parameter in the transmission time to the AP, including：
First STA sends the NDP by the RU in the described first transmission time to the AP.
16. method according to claim 15, it is characterised in that the NDP also includes：Common preamble part；Accordingly,
The first transmission time includes：First STA sends the second transmission time and the institute of the common preamble part of the NDP
State the 3rd transmission time that the first STA sends the training sequence part of the NDP；
Accordingly, the STA sends the time by the RU to the AP transmission NDP described first, including：
The STA sends the time at least through the bandwidth occupied by the RU described second, sends the NDP's to the AP
Common preamble part；
The STA sends the training sequence part of the NDP in the described 3rd transmission time by the RU to the AP.
17. the method according to any one of claim 8-14, it is characterised in that the first STA is according to the parameter
Configured information determines transmission parameter and transmission time, including：
First STA determines the spatial stream number N of the first STA according to the corresponding parameter configured informations of the first STAss、
Spatial flow position and the first STA send the RU used in the NDP；Wherein, the NDP includes：Common preamble part and instruction
Practice Sequence；
First STA determines the 4th transmission time and the 5th transmission time according to the corresponding parameter configured informations of the 2nd STA；Its
In, the 2nd STA includes：STA in the signaling domain of the TF-S before the signaling domain of the first STA；Described
Four send the transmission time that the times are the common preamble part that the first STA sends the NDP, and the 5th transmission time is
First STA sends the transmission time of the training sequence part of the NDP；
Accordingly, the first STA sends NDP according to the transmission parameter in the transmission time to the AP, including：
First STA sends the time at least through the bandwidth occupied by the RU the described 4th, sends described to the AP
NDP common preamble part；
First STA sends the training sequence part of the NDP in the described 5th transmission time by the RU to the AP.
18. a kind of means for channel measurement, it is characterised in that access point AP includes the means for channel measurement, described device includes：
Sending module, for sending channel measurement trigger frame TF-S at least two site STAs；Wherein, the TF-S is used to touch
Send out at least two STA described and send the empty data frame NDP measured for up channel；The TF-S includes：Each STA
The parameter configured information for the transmission parameter that the NDP is used is sent, the parameter configured information is used for the STA and determines to set out
Send parameter and transmission time；
Receiving module, for receiving STA described at least two respectively in each described STA corresponding transmission times according to
STA is corresponding to send the NDP that parameter is sent, and carries out channel measurement；Wherein, any two is adjacent in STA described at least two
Without interframe space between NDP transmitted by STA.
19. device according to claim 18, it is characterised in that each STA sends the transmission that the NDP is used
The parameter configured information of parameter includes one of following information or any combination：
Access identity card AID, the spatial flow configured information of the STA and the STA of the STA is sent used in the NDP
Channel resource units RU configured informations；
Wherein, the AID of the STA is used to indicate that the STA needs to send NDP to the AP；The spatial flow of the STA indicates letter
Breath includes the configured information that the STA sends the training sequence part in the NDP to the AP.
20. the device according to claim 18 or 19, it is characterised in that also include in the TF-S：Each STA is corresponding to be carried
Ripple intercepts instruction；The carrier sense indicates to be used to indicate whether the STA carries out carrier sense；Wherein, if the carrier wave is detectd
Instruction is listened to indicate that the STA need not carry out carrier sense, then the STA directly sends NDP to the AP；If the carrier sense
Indicate that the STA carries out carrier sense, then the STA carries out carrier sense before NDP is sent to the AP.
21. the device according to any one of claim 18-20, it is characterised in that the TF-S is contained in physical layer association
Discuss data cell PPDU data division；Wherein, trigger frame configured information, institute are included in the physical layer preamble part of the PPDU
State trigger frame configured information be used for indicate the data division whether containing type be TF-S media access control mac frame.
22. the device according to any one of claim 18-21, it is characterised in that in the common signaling domain of the TF-S
Including type indication information；Wherein, the type that the type indication information is used to indicate trigger frame is TF-S.
23. the device according to any one of claim 18-22, it is characterised in that the receiving module specifically for：
The NDP that each described STA is sent successively in the corresponding first transmission time according to corresponding transmission parameter is received, wherein,
The NDP includes：Common preamble part and training sequence part, or, the NDP includes：Training sequence part.
24. the device according to any one of claim 18-22, it is characterised in that the receiving module, including：
First receiving unit, sends simultaneously for receiving each described STA in the 4th transmission time according to corresponding transmission parameter
NDP common preamble part；Described 4th sends the transmission for the time NDP common preamble part being sent for each described STA
Time；
Second receiving unit, for receive each described STA the corresponding 5th transmission time according to it is corresponding transmission parameter according to
The NDP of secondary transmission training sequence part；It is that the STA sends the NDP's that each described STA the corresponding 5th, which sends the time,
The transmission time of training sequence part；
Wherein, without interframe space between the training sequence part that the common preamble part of the NDP and first STA are sent, and
And without interframe space between the training sequence part of any two adjacent S TA transmissions；First STA is described at least two
The STA of first transmission training sequence part in STA.
25. a kind of means for channel measurement, it is characterised in that the first site STA includes the means for channel measurement, described device bag
Include：
Receiving module, the channel measurement trigger frame TF-S for receiving access point AP transmissions；Wherein, the TF-S is used to trigger extremely
Few two STA send the empty data frame NDP measured for up channel；The TF-S includes：Each STA sends described
The parameter configured information for the transmission parameter that NDP is used；Wherein, the first STA belongs at least two STA；
First determining module, for determining to send parameter according to the parameter configured information and sending the time；
Sending module, for sending NDP to the AP according to the transmission parameter in the transmission time；Wherein, the NDP with
Without interframe space between NDP transmitted by any STA adjacent STA.
26. device according to claim 25, it is characterised in that each STA sends the transmission that the NDP is used
The parameter configured information of parameter includes one of following information or any combination：
Access identity card AID, the spatial flow configured information of the STA and the STA of the STA is sent used in the NDP
Channel resource units RU configured informations；
Wherein, the AID of the STA is used to indicate that the STA needs to send NDP to the AP；The spatial flow of the STA indicates letter
Breath includes the configured information that the STA sends the training sequence part in the NDP to the AP.
27. the device according to claim 25 or 26, it is characterised in that also include in the TF-S：Each STA is corresponding to be carried
Ripple intercepts instruction；The carrier sense indicates to be used to indicate whether the STA carries out carrier sense；Wherein, if the carrier wave is detectd
Instruction is listened to indicate that the STA need not carry out carrier sense, then the STA directly sends NDP to the AP；If the carrier sense
Indicate that the STA carries out carrier sense, then the STA carries out carrier sense before NDP is sent to the AP.
28. device according to claim 27, it is characterised in that also include：
Second determining module, for being indicated to determine whether to carry out carrier sense according to the carrier sense；
Accordingly, the sending module specifically for：
When second determining module determines to carry out carrier sense, or determine to need to carry out carrier sense and intercepted result
During for channel idle, NDP is sent to the AP according to the transmission parameter in the transmission time.
29. the device according to any one of claim 25-28, it is characterised in that in the common signaling domain of the TF-S
Including type indication information；Wherein, the type that the type indication information is used to indicate trigger frame is TF-S.
30. the device according to any one of claim 25-28, it is characterised in that the TF-S is contained in physical layer association
Discuss data cell PPDU data division；Wherein, trigger frame configured information, institute are included in the physical layer preamble part of the PPDU
State trigger frame configured information be used for indicate the data division whether containing type be TF-S media access control mac frame.
31. device according to claim 30, it is characterised in that also include：
3rd determining module, for determining that the data division containing type of the PPDU is according to the trigger frame configured information
TF-S mac frame.
32. the device according to any one of claim 25-31, it is characterised in that first determining module, including：
First determining unit, the spatial flow for determining the first STA according to the corresponding parameter configured informations of the first STA
Number Nss, spatial flow position and the first STA send RU used in NDP；Wherein, the NDP includes：Training sequence part；
Second determining unit, for determining for the first transmission time according to the corresponding parameter configured informations of the 2nd STA；Wherein, it is described
2nd STA includes：STA in the signaling domain of the TF-S before the signaling domain of the first STA；During first transmission
Between be transmission time that the first STA sends the NDP；
Accordingly, the sending module specifically for：
The NDP is sent to the AP by the RU in the described first transmission time.
33. device according to claim 32, it is characterised in that the NDP also includes：Common preamble part；Accordingly,
The first transmission time includes：First STA sends the second transmission time and the institute of the common preamble part of the NDP
State the 3rd transmission time that the first STA sends the training sequence part of the NDP；
Accordingly, the sending module specifically for：
Send the time at least through the bandwidth occupied by the RU described second, to the AP send the NDP it is public before
Lead part；
Send the training sequence part of the NDP to the AP by the RU in the described 3rd transmission time.
34. the device according to any one of claim 25-31, it is characterised in that first determining module, including：
3rd determining unit, the spatial flow for determining the first STA according to the corresponding parameter configured informations of the first STA
Number Nss, spatial flow position and the first STA send RU used in the NDP；Wherein, the NDP includes：Common preamble part
And training sequence part；
4th determining unit, for determining the 4th transmission time and the 5th transmission according to the corresponding parameter configured informations of the 2nd STA
Time；Wherein, the 2nd STA includes：STA in the signaling domain of the TF-S before the signaling domain of the first STA；
Described 4th sends the transmission time that the time is the common preamble part that the first STA sends the NDP, and the described 5th sends
Time is the transmission time for the training sequence part that the first STA sends the NDP；
Accordingly, the sending module specifically for：
Send the time at least through the bandwidth occupied by the RU the described 4th, to the AP send the NDP it is public before
Lead part；
Send the training sequence part of the NDP to the AP by the RU in the described 5th transmission time.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071088.5A CN107027145B (en) | 2016-02-01 | 2016-02-01 | Channel measurement method and device |
| PCT/CN2017/070991 WO2017133420A1 (en) | 2016-02-01 | 2017-01-12 | Channel measuring method and device |
| EP17746740.4A EP3404955B1 (en) | 2016-02-01 | 2017-01-12 | Channel measuring method and device |
| US16/051,518 US10863375B2 (en) | 2016-02-01 | 2018-08-01 | Channel measurement method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071088.5A CN107027145B (en) | 2016-02-01 | 2016-02-01 | Channel measurement method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107027145A true CN107027145A (en) | 2017-08-08 |
| CN107027145B CN107027145B (en) | 2021-01-01 |
Family
ID=59499296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610071088.5A Active CN107027145B (en) | 2016-02-01 | 2016-02-01 | Channel measurement method and device |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10863375B2 (en) |
| EP (1) | EP3404955B1 (en) |
| CN (1) | CN107027145B (en) |
| WO (1) | WO2017133420A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380746A (en) * | 2018-03-12 | 2019-10-25 | 苏州速通半导体科技有限公司 | Duplex communication method and site apparatus in a kind of efficient WLAN |
| WO2019242671A1 (en) * | 2018-06-22 | 2019-12-26 | 华为技术有限公司 | Channel estimation method and apparatus, and communication system |
| WO2020093890A1 (en) * | 2018-11-06 | 2020-05-14 | 华为技术有限公司 | Data transmission method and communication device |
| CN111357209A (en) * | 2017-11-21 | 2020-06-30 | 中兴通讯股份有限公司 | Method, apparatus and system for performing channel measurements in a multi-beam wireless communication network |
| CN111630786A (en) * | 2018-01-10 | 2020-09-04 | 联发科技（新加坡）私人有限公司 | Null data packet detection for preamble puncturing techniques |
| CN111682913A (en) * | 2019-03-11 | 2020-09-18 | 华为技术有限公司 | Method and device for discovering AP and method and device for sending beacon frame by AP in WLAN |
| WO2020200320A1 (en) * | 2019-04-03 | 2020-10-08 | 华为技术有限公司 | Training sequence transmission method and device |
| WO2021114053A1 (en) * | 2019-12-09 | 2021-06-17 | 北京小米移动软件有限公司 | Transmission measurement method, transmission measurement device and storage medium |
| WO2021134593A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Wi-fi channel measurement method, apparatus, and system |
| CN113452635A (en) * | 2020-03-27 | 2021-09-28 | 华为技术有限公司 | Method, station and access point for frequency offset estimation |
| US12028842B2 (en) | 2018-11-06 | 2024-07-02 | Huawei Technologies Co., Ltd. | Data transmission method and communications apparatus |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114364052A (en) | 2016-08-25 | 2022-04-15 | 华为技术有限公司 | Data communication method and device |
| US10686628B2 (en) * | 2016-11-14 | 2020-06-16 | Intel IP Corporation | Access point (AP), station (STA) and methods of channel sounding in accordance with contention based access |
| US11109356B2 (en) * | 2017-04-05 | 2021-08-31 | Intel Corporation | Apparatus, system and method of trigger-based ranging measurement |
| US10986505B2 (en) * | 2018-08-29 | 2021-04-20 | Qualcomm Incorporated | Spatial reuse for WLAN networks |
| US11616615B2 (en) * | 2019-01-07 | 2023-03-28 | Intel Corporation | Adaptation of secure sounding signal to bandwidth variation |
| US11950286B2 (en) * | 2022-03-29 | 2024-04-02 | Qualcomm Incorporated | Uplink multiple access sounding sequences |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101479958A (en) * | 2006-06-27 | 2009-07-08 | 高通股份有限公司 | Method and system for providing beamforming feedback in wireless communication systems |
| US20140079010A1 (en) * | 2011-05-06 | 2014-03-20 | Zte Corporation | Method and system for feeding back channel measurement information |
| CN104253673A (en) * | 2013-06-25 | 2014-12-31 | 华为技术有限公司 | Uplink multi-user data transmission method and uplink multi-user input output system |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8923219B2 (en) * | 2010-02-17 | 2014-12-30 | Qualcomm Incorporated | Method and apparatus for supporting adaptive channel state information feedback rate in multi-user communication systems |
| US20110199946A1 (en) * | 2010-02-17 | 2011-08-18 | Qualcomm Incorporated | Method and apparatus for supporting adaptive channel state information feedback rate in multi-user communication systems |
| US8630195B2 (en) * | 2010-07-26 | 2014-01-14 | Intel Corporation | Method and devices for multiple station sounding in a wireless local area network |
| US8976877B2 (en) * | 2010-09-24 | 2015-03-10 | Intel Corporation | Techniques for multi-user MIMO sounding in wireless networks |
| KR101099345B1 (en) * | 2010-12-01 | 2011-12-26 | 엘지전자 주식회사 | Method for channel sounding in wireless local area network and apparatus for the same |
| CN102780519B (en) * | 2011-05-13 | 2017-02-01 | 中兴通讯股份有限公司 | Radio frame sending method and device and communication network element |
| CN103312466A (en) * | 2012-03-16 | 2013-09-18 | 中兴通讯股份有限公司 | Transmission method and receiving station for null feedback frame |
| CN103582137B (en) * | 2012-07-19 | 2018-01-02 | 华为技术有限公司 | WLAN channel resource allocation method and equipment, wireless lan communication system |
| US9680538B2 (en) * | 2012-09-28 | 2017-06-13 | Interdigital Patent Holdings, Inc. | Method for WiFi beamforming, feedback, and sounding (WiBEAM) |
| BR112016000164B1 (en) * | 2013-07-05 | 2022-08-16 | Nokia Technologies Oy | METHOD AND APPLIANCE |
| US20150110046A1 (en) * | 2013-10-17 | 2015-04-23 | Qualcomm Incorporated | Methods and apparatus for channel state information feedback |
| WO2015068968A1 (en) * | 2013-11-07 | 2015-05-14 | 엘지전자 주식회사 | Method and device for receiving multiuser uplink in wireless lan |
| US10027512B2 (en) * | 2014-01-06 | 2018-07-17 | Lg Electronics Inc. | Method and apparatus for sounding in wireless communication system |
| WO2015156495A1 (en) * | 2014-04-09 | 2015-10-15 | 엘지전자 주식회사 | Method and apparatus for transmitting frame on basis of sounding procedure |
| US20170054542A1 (en) * | 2015-08-19 | 2017-02-23 | Qualcomm Incorporated | Sounding design for channel feedback |
-
2016
- 2016-02-01 CN CN201610071088.5A patent/CN107027145B/en active Active
-
2017
- 2017-01-12 EP EP17746740.4A patent/EP3404955B1/en active Active
- 2017-01-12 WO PCT/CN2017/070991 patent/WO2017133420A1/en active Application Filing
-
2018
- 2018-08-01 US US16/051,518 patent/US10863375B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101479958A (en) * | 2006-06-27 | 2009-07-08 | 高通股份有限公司 | Method and system for providing beamforming feedback in wireless communication systems |
| US20140079010A1 (en) * | 2011-05-06 | 2014-03-20 | Zte Corporation | Method and system for feeding back channel measurement information |
| CN104253673A (en) * | 2013-06-25 | 2014-12-31 | 华为技术有限公司 | Uplink multi-user data transmission method and uplink multi-user input output system |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11211987B2 (en) | 2017-11-21 | 2021-12-28 | Zte Corporation | Methods, apparatus and systems for performing channel measurement in a multi-beam wireless communication network |
| CN111357209A (en) * | 2017-11-21 | 2020-06-30 | 中兴通讯股份有限公司 | Method, apparatus and system for performing channel measurements in a multi-beam wireless communication network |
| CN111357209B (en) * | 2017-11-21 | 2022-11-01 | 中兴通讯股份有限公司 | Method, apparatus and system for performing channel measurements in a multi-beam wireless communication network |
| CN111630786A (en) * | 2018-01-10 | 2020-09-04 | 联发科技（新加坡）私人有限公司 | Null data packet detection for preamble puncturing techniques |
| US11784683B2 (en) | 2018-01-10 | 2023-10-10 | Mediatek Singapore Pte. Ltd. | Null data packet sounding for preamble puncture techniques |
| CN110380746A (en) * | 2018-03-12 | 2019-10-25 | 苏州速通半导体科技有限公司 | Duplex communication method and site apparatus in a kind of efficient WLAN |
| WO2019242671A1 (en) * | 2018-06-22 | 2019-12-26 | 华为技术有限公司 | Channel estimation method and apparatus, and communication system |
| CN110635827A (en) * | 2018-06-22 | 2019-12-31 | 华为技术有限公司 | Channel estimation method, device and communication system |
| CN110635827B (en) * | 2018-06-22 | 2021-06-01 | 华为技术有限公司 | Channel estimation method, device and communication system |
| WO2020093890A1 (en) * | 2018-11-06 | 2020-05-14 | 华为技术有限公司 | Data transmission method and communication device |
| US12028842B2 (en) | 2018-11-06 | 2024-07-02 | Huawei Technologies Co., Ltd. | Data transmission method and communications apparatus |
| CN111682913B (en) * | 2019-03-11 | 2022-03-29 | 华为技术有限公司 | Method and device for discovering AP and method and device for sending beacon frame by AP in WLAN |
| CN111682913A (en) * | 2019-03-11 | 2020-09-18 | 华为技术有限公司 | Method and device for discovering AP and method and device for sending beacon frame by AP in WLAN |
| CN111786914A (en) * | 2019-04-03 | 2020-10-16 | 华为技术有限公司 | Training sequence transmission method and device |
| WO2020200320A1 (en) * | 2019-04-03 | 2020-10-08 | 华为技术有限公司 | Training sequence transmission method and device |
| CN111786914B (en) * | 2019-04-03 | 2024-04-12 | 华为技术有限公司 | Training sequence transmission method and device |
| CN113261324A (en) * | 2019-12-09 | 2021-08-13 | 北京小米移动软件有限公司 | Transmission measurement method, transmission measurement device, and storage medium |
| WO2021114053A1 (en) * | 2019-12-09 | 2021-06-17 | 北京小米移动软件有限公司 | Transmission measurement method, transmission measurement device and storage medium |
| CN113261324B (en) * | 2019-12-09 | 2023-07-25 | 北京小米移动软件有限公司 | Transmission measurement method, transmission measurement device, and storage medium |
| WO2021134593A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Wi-fi channel measurement method, apparatus, and system |
| CN113452635A (en) * | 2020-03-27 | 2021-09-28 | 华为技术有限公司 | Method, station and access point for frequency offset estimation |
| CN113452635B (en) * | 2020-03-27 | 2022-12-27 | 华为技术有限公司 | Method, station and access point for frequency offset estimation |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017133420A1 (en) | 2017-08-10 |
| US20180343580A1 (en) | 2018-11-29 |
| CN107027145B (en) | 2021-01-01 |
| US10863375B2 (en) | 2020-12-08 |
| EP3404955B1 (en) | 2020-03-11 |
| EP3404955A1 (en) | 2018-11-21 |
| EP3404955A4 (en) | 2018-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107027145A (en) | Channel measuring method and device | |
| CN108200000B (en) | Transmit method, the Wireless LAN device of information | |
| KR102215932B1 (en) | Transmission method and apparatus in extended range mode | |
| CN109698740A (en) | The method, apparatus of scheduling of resource | |
| CN106341828A (en) | Channel measuring method and STA | |
| WO2019170097A1 (en) | Method for determining location of control channel, and device and processor-readable storage medium | |
| US11206676B2 (en) | Method and device for transmitting or receiving scheduling information | |
| CN110113808A (en) | System and method for power control | |
| CN113612576A (en) | Method and device for indicating and receiving middle lead code | |
| CN107027133A (en) | A kind of method of processing information, the first access point and the first website | |
| JP6612895B2 (en) | Resource designation method and apparatus for WLAN system | |
| CN109547072A (en) | Method, communication equipment and the computer readable storage medium of channel detection | |
| WO2017084582A1 (en) | Method and apparatus for channel resource indication | |
| CN107889236A (en) | Parameter determination method, base station and user equipment | |
| CN111030793B (en) | Method and device for triggering frame transmission in wireless local area network | |
| CN105530712B (en) | Direct connected link dispatching method, access point and terminal device | |
| CN104854904A (en) | Data scheduling method, device, base station and terminal | |
| CN109756297A (en) | Downlink PPDU's sends and receives method and device | |
| JP6695435B2 (en) | Method and apparatus for indicating channels in a wireless local area network | |
| WO2011085697A1 (en) | Method and device for measuring interference | |
| CN102938909B (en) | The sweep-out method of redundancy NAV duration in a kind of WLAN (wireless local area network) TXOP | |
| CN106572198A (en) | MAC (Medium access control) packet header compression method, device and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |